ALL ABOUT CRITICAL PATH METHOD (CPM)…7. It is the float available to the activity regardless of the timing of either node. Perform the forward and backward pass calculations on the AOA diagram provided below. and complete a financial statement audit by an independent auditor who is required to consider ICFR in the performance of that audit. densityDpi / 160)); does not work on small devices because it is divided by zero. Float Calculations. We have identified the critical path and the duration of the. The result is a data frame, which can be easily added to a plot using the ggpubr R package. It does not affect start of succeeding activity i. Hence, the total float is the excess of the maximum available time throughout the time of the activity. Calculate the forces in members AC, AD, and DE for the loaded truss. (b) Indicate the criticla path. This chapter discusses the common arithmetical methods for calculating the two main types of float (total and free) and the early and late starts and finishes and finding the critical path (or paths). Total float (TF) is a by-product of the CPM calculation []; TF is the difference between the time available for performing an activity and the time required for doing it []. The project start date is September 7, 2020. 1 Tasks A,B,C,…. Determine the critical path. Free Float can only be non-zero when two or more activities have a common successor activity. It is common to collectively refer to this sequence of activities as the 3-day float path. First, let’s calculate the total float by subtracting the duration of the non-critical path from the critical path. How to calculate Independent Float used in CPM using this online calculator? To use this online calculator for Independent Float used in CPM, enter Free Float (FF 0) & Slack of an Event (S) and hit the calculate button. Total Float = LS – ES. Parameters: x, yarray_like. 2. Crashing: The crashing is the reduction in the duration of the_project. . 3. Independent float calculator uses Independent Float = Early Finish Time - Late Start Time - Activity Time to calculate the Independent Float, Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. 8. Independent float = EST for j - LST for i - duration of activity The determination of total, free and independent float is illustrated in Figure 20. Independent Float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. Are ordinary shares issued by a foreign issuer treated as "common equity securities" for purposes of this calculation? A: Yes. The steps shown in the following table are to be planned. linregress(x, y=None, alternative='two-sided') [source] #. After the most critical path is identified, the module will calculate the remaining sub-critical paths. Steps to be followed: The following steps should be followed for computing Cyclomatic complexity and test cases design. We will see more about numeric types later in the tutorial. 1. 9. If the fruit or vegetable floats, push it down with the tip of a pencil until water spills out and over into the pan. I hope it is going to help you all. 55, 0. Independent float – The amount of time by which the start of an activity can be delayed without effecting the earliest start time of any immediately following activities, assuming that the preceding activity has finished at its latest finish time. Here is how the Independent Float used in CPM calculation can be explained with given input values -> 0. PDM float Calculations Non-contiguous Durations13 Allowing the overall duration of an activity to stretch to. It is recommended to consult with professionals or engineers to consider these. Here is how the Independent Float used in CPM calculation can be explained with given input values -> 0. As forensic float is measured from actual dates forward, forensic drift is also required to properly calculate forensic total float. In the case of two samples, the samples are assumed to be independent. a traditional CPM calculation, four types of float can be calculated: total float (TF), free float (FF), interfering float (INTF) and independent float (INDF). Float represents the amount of time a particular task can be delayed without jeopardizing or delaying the entire project. Solution: Check the schedule options and to compute “Total Float” as “Finish Float=Late Finish-Early Finish”. 101 has value 1/2 + 0/4 + 1/8. Time available for an activity performance minus the duration of the activity C. Free float = Free float for activity A — 10-4-6=0 Free float for activity B = Free float for activity D — Free float for activity C = 15-10-5=0 Free float for activity E = 15—8—3=4 Free float for activity F = 18-15-3=0 (vii) Independent float calculations : Independent float = EST of tail event — LFT of head event — Activity durationIn construction project, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: 1. Slack of Event given Independent Float calculator uses Slack of an Event = Free Float - Independent Float to calculate the Slack of an Event, The Slack of Event given Independent Float formula is defined as the amount of time it can be delayed without affecting the project schedule, considering independent float. This float has no impact on the project's earliest completion. This can help you determine how many days of float you have to complete a task without delaying subsequent tasks on the critical path. fromhex(hex_string)) where hex_string is the input hexadecimal value. Step 3 – Cyclomatic Complexity Calculation. 5E-5 = 3974400-1987200. How to calculate Independent Float used in CPM using this online calculator? To use this online calculator for Independent Float used in CPM, enter Free Float (FF0) & Slack of an Event (S) and hit the calculate button. Using the same process, we can also calculate the float for other paths. Formulas for calculating Total Float and Free Float are as follows: Total Float = LS – ES (it is also calculated by LF – EF)Free Float = Lowest ES of successors – EF. There are two formulas to. Example :7. Refining 6. CV = EV – AC. This involves tasks that must be completed in a specific sequence in order to meet its timely completion, with zero Free Float; any delay on this path would delay its overall. VIF calculations use these R. The simplicity and power of this idea is striking. or the scientific notation E or e , e. Activity: The_activity represents the task. Please note that if two activities converge into a single activity, only one of these two activities may have a free float. Operation research - PERT CPM calculator - Critical path, Total float, Free float, Independent float, step-by-step online. It is the path with the greatest total. Total Float = LF – EF. How to calculate Independent Float using this online calculator? To use this online calculator for Independent Float, enter Early Finish Time (EFT), Late Start Time (LST) & Activity Time (t activity) and hit the calculate button. The factors total, free and independent floats are discussed with. 2b), which would be the most recent fiscal year for which audited financial statements are included in the initial registration statement. Check out for more free engineering tutorials and math lessons! Project Management Tutorial: Determine Total. . Figure 1: K/N SEP. Calculate the weight of the buoy as follows: 2 ft-cubed x 15 pounds / ft-cubed = 30 pounds. How to calculate float Each of the five types of float above has their own calculations. 1. Make a list of all the activities of the project along with their dependencies and their specific times. Amount of time a project can be delayed without impacting an imposed deadline. The normalizing step in the end iterates typically twice. We use a forward pass for calculating this is calculated using Early Finish Time = Early Start Time + Safety Stock. Total Float: The total amount of time that a schedule activity may be delayed from its early start date without delaying the project finish date, or violating a schedule constraint. C. The significance of independent float is that. Independent float calculator uses Independent Float = Early Finish Time - Late Start Time - Activity Time to calculate the Independent Float, Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. Hello friends, this video contains detail elaboration of float in a project management. The importance of calculating Total Float and Free Float are found it the definitions of these terms. In contrast, the total float is a measure of a task's flexibility and how much it can be delayed without affecting the overall completion date of the project. In this work we apply MF-DFA method to compare multifractal behavior of various exchange rates during the periods of managed and independent float regimes. Water displacement works because the amount of water displaced by an object submerged in water equals the volume of the. If any activity on the critical path is delayed, the completion of the project will be delayed by an equal amount. Independent Float video > Relationship Slack [Slack] - the amount of ‘unused’ time difference between the predecessor and the successor activities or relative float in relationships. It is computed for an activity by subtracting the tail event slack from its total float. To calculate a task’s total float, simply take the difference between the. How to use our float time calculator. You can select input skins from the left pane. To calculate total float, subtract the task’s earliest finish (EF) date from its latest finish (LF) date. In Python, floating point numbers (float) are positive and negative real numbers with a fractional part denoted by the decimal symbol . Here is how the Free Float calculation can be explained with given input values -> 8. Here, the free float calculation formula is: Free float = (earliest start of the dependant task) - (earliest finish of current activity). Public float of less than $250 million. Float, sometimes called Slack (float) , is the amount of time an activity, network path, or project can be delayed from the early start without changing the completion date of the project. Float = Late Finish (LF) – Early Finish (EF) TIP: Both formulas start with LATE. While total float is the amount of time a task can be delayed without impacting the completion time of the project as a whole. 2 Gross margin: 3,317. If a project was a simple set of individual tasks in a linear order, it would be easy to say that Task B cannot start until Task A is completed. Let’s confirm this with second method. Annual revenues of less than $100 million and either no public float or a public float of. Independent float (INDF) — INDF is the maximum amount of delay time a critical task can have without pushing the next one. If you want to know the buoyant force on an object, you only need to determine the weight of the fluid displaced by the object. Groups: Spider Project Team. IF = E j – L i - d ij. Ei, and Li for i and Ej, and Lj for j, Now . Both are calculated first for the critical. 2 Production costs: 4,250. We find that in most analyzed cases after the transition from a. Alternately,. 1. 73. The project has two critical paths: activities B and C, or A, D, and F – giving a minimum project time of 7 months with fast tracking. 1-2 1-3 1-5 2-3 2-4 3-4 3-5 3-6 4-6 5-6 8 7 12 4 10. The exact buoyancy can vary based on factors like drum design and water density. Commit additional resources to work on the zero float tasks that will move the project finish date forward. value float. 4). Calculate a linear least-squares regression for two sets of measurements. DIPs = pixels / (DPI / USER_DEFAULT_SCREEN_DPI) To get the DPI setting, call the GetDpiForWindow function. You can use Late Start or Late Finish. Once you identify the important dates for your task, you can calculate the total float of it by subtracting the EF from the LF. (AOA) and (AON) Network Construction and Critical Path Calculations (Using Four Methods) EXAMPLE: Construct the (AOA) and (AON) networks for the project whose activities, their durations and their precedence relationships are as given in the table, also find: i) [ES, EF, LS, LF, Slack] for all activities. Independent float (INDF) Independent float is the length of time that you can delay a task without it impacting the early start date of the next step. The consumption of the Independent Float does not affect the surrounding activities’ dates in any possible way. For activity 2-3, shown in the above figure, calculate the sum of the total float, the free float, and the independent float. Save yourself the time and hassle of updating your entire critical path diagram, also known as a project network diagram, manually. Activity 5 has a float of 14 - 9, which is 5. It does not affect latest completion of preceding activity. Even a worst case set, I suspect would iterate the binary width of the float signicand, about 23 times. Both parts must be turned on a lathe Y must be polished where as X need not be polished. EAC = AC + ETC. The Slack of Event given Independent Float formula is defined as the amount of time it can be delayed without affecting the project schedule, considering independent float and is represented as S = FF 0-IF 0 or Slack of an Event = Free Float-Independent Float. The cyclomatic complexity of a code section is the quantitative measure of the number of linearly independent paths in it. Publisher: McGraw-Hill Education. We calculate the multifractal spectra and estimate the complexity parameters from four degree polynomial fit. . How to calculate Interfering Float using this online calculator? To use this online calculator for Interfering Float, enter Total Float (TF0) & Free Float (FF0) and hit the calculate button. Calculate the task's total float. AON network system enables efficient scheduling and controlling. Activities for this project are as below (output from Define Activities process) –. In this work we apply MF-DFA method to compare multifractal behavior of various exchange rates during the periods of managed and independent float regimes. Independent Float: Obtained by deducting the Late start plus the activity duration from the Early Finish. The critical path of the project is 1-3-5-7-8-10 and in the network diagram has been shown by double lines joining. Amount of work completed to date compared with planned in. To calculate a task’s total float, simply take the difference between the. - The accumulative time span in which the completion of all activities may occur and not delay the termination date of the project is the total float. We find that in most analyzed cases after the transition from a. Author (s): P. Early start and finish are calculated by forward pass through the network path, and Late start and finish are calculated by backward pass. Learn morePerform a t-test in R using the following functions : t_test () [rstatix package]: a wrapper around the R base function t. H,I constitute. stats. This slack value has nothing to do with the float values or either of the two activities that it relates. Independent float calculator uses Independent Float = Early Finish Time - Late Start Time - Activity Time to calculate the Independent Float, Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. Screen density is grouped as low, medium, high, and extra high. For example, the decimal fraction 0. This video will explain the terms associated with the network analysis for cost scheduling. Extensions of the proposed formula to other floats such as safety float and interference float are also. Here is how the Independent Float used in CPM calculation can be explained with given input values -> 0. So in this cse, lead time could be considered 'negative' float. the parameter will get assigned a fallback value according to the data type (1 for integer, 1. The requirement of masons for each of the activity has been show above the arrows in the network diagram. Float is the late start minus the early start. d) Interference float. Additional Information. Free float, on the other hand, is calculated by subtracting the task’s earliest finish date from its earliest start date. Rotameter flow meters are devices that can measure the flowrate of liquids and gases. WebMarket research has already indicated the volume expected and the size of sales force required. Here is how the Free Float calculation can be explained with given input values -> 8. To use this online calculator for Free Float given Indenpendent Float, enter Independent Float (IF 0) & Slack of an Event (S) and hit the calculate button. Free Float = ES2 – EF1. . Check out for more free engineering tutorials and math lessons!Project Management Tutorial: Use forward and backward pass to det. On critical path LS = ES and LF = EF hence total float is equal to zero. 14 - 12 = 2. Start with the critical path, beginning at the last activity’s late finish. This video will explain the terms associated with the network analysis for cost scheduling. Total Float = LF – EF. All the following formulas along with the full form of their abbreviations are listed in the downloadable cheat sheet. Imagine a buoy made of cork floating on water. The nodes that shall be used to calculate the float are the start and end of the activity: 3 and 6. Capture the first falling edge and store the value of the timer in startTime. 5E-5 = 3974400-1987200. 5, 2020 • 0 likes • 614 views. Join winding tracks. An entity is a smaller reporting company if it has a public float (the aggregate market value of the issuer’s outstanding voting and non-voting common equity held by non-affiliates) of less than $250 million; or. Slack or float time for an activity is the difference between its early start and early finish, or the difference between its late start and late finish. Network activities and duration times . By looking at some reference I found them to be: Finish Float = Late Finish - Early Finish. In this note, we present a correct version of the formula. Mandatory dependency C. 5 (41%) Gross margin reduced by 3% How can I analyse my production costs to. Critical path is the path which gives us or helps us to estimate the earliest time in which the whole project can be completed. There are a couple of ways to calculate free and total float. 3 The Forward Pass. Now, if we calculate the total movement, we get: total movement = 500 * 1 * 10 = 5000; The player who is playing in 20 fps moved 200 unit and the other one who is playing in 500 fps moved 5000 unit. Define "negative float" Obtained by having a fixed project start date and a fixed project finish date, where the finish date is set at a time earlier than would be calculated by the forward pass. These variables simply represent the earliest and latest times that an activity can start and finish. Calculating density uses the formula D = m ÷ v, where D means density, m means mass and v means volume. In accounting and bookkeeping, float is the time between the writing of a check and the time that the check clears the bank account on which it is drawn. Create Rank or Row Number calculations. Andrew, Lag and Lead [what most people call negative lag] are inputs to a PDM model; Floats are computed outputs. Earned value and negative float is a condition in the schedule that indicates the project will be unable to meet one or more of its objectives. It measures the number of linearly independent paths through the program code. Based on project management perspective, TF is. The critical path is the path through the network that results in the latest completion date of the project. Let’s confirm this with second method. Level out the requirement of the resource if the maximum number of masons has been limited to 7. Core Scheduling Papers: #5. The project's degree of flexibility can be determined by identifying the float. To use this online calculator for Free Float given Indenpendent Float, enter Independent Float (IF 0) & Slack of an Event (S) and hit the calculate button. 2. As you can see, a task's total and free float can be different. Calculate critical path, project float, early start dates, and late start dates. Calculation of LFT and LST 49. . Exhibit 5. The tools used to calculate critical path are forward pass, backward pass, and fl oat calculation. Use the resource known as "float" to cover project risks or unforeseen problems. But, whereas Arrow diagrams had discrete components and precise. ediff1d (ary[, to_end, to_begin]) The differences between consecutive elements of an array. Here is how the Independent Float calculation can be explained with given input values -> 3. The critical path method (CPM) is a project management technique that’s used by project managers to create an accurate project schedule. You can think of float as the gap between EF and LF, or ES and LS. Fig. The Total Float in CPM formula is defined as the time span by which the starting or finishing time can be delayed without delaying or affecting the overall project. Sign Bit (Byte 1): The leftmost bit (most significant bit – MSB) represents the sign of the float. The conversion from physical pixels to DIPs uses the following formula. . FFE = EE(j) - EFT = 31 - 25 = 6 Three other types of float were considered/calculated6: - Independent Float (IF): The amount of scheduling flexibility available on the activity without displacing any other activity (before or after). There are four types of float or slack that you can calculate using a network diagram: total float, free float, project float, and independent float. The report and qualifications of the independent. Figure 2. The integer numbers (e. Resolution is. We use cookies to improve your experience on our site and to show you relevant advertising. This is my dp to px formula:Free Float Formula. The Total Float is measured as the difference between the early start and late start dates (LS – ES) or late finish and early finish dates (LF – EF). Here is how the Independent Float calculation can be explained with given input values -> 3. In this short video I demonstrate how to draw a network diagram, find the critical path, and determine the project duration on a small example. How to calculate Independent Float using this online calculator? To use this online calculator for Independent Float, enter Early Finish Time (EFT), Late Start Time (LST) & Activity Time (t activity) and hit the calculate button. Calculation: Slack = latest finish time – Earliest finish time. If it is necessary to increase the duration of time, independent float (IF) can be used without necessitating any re-planning. Independent Float: It is the minimum. Smallest of Start Float and Finish Float, which is the most critical float value By default, Primavera P6 will calculate float using Finish Float = Late Finish – Early Finish . Exponent Bits (Byte 2 and Byte 3): The next 8 bits represent the exponent of the float. Besides single-precision, the IEEE754 standard also codifies double. Please let me. Total Float is the total amount of time a task can be delayed and still keep the project on schedule, while Free Float is the amount of time a task can be delayed without impacting other tasks in the project. You see that your calculated critical path activities on the schedule network diagram will take 22 days. What are the three types of float? Types of Float Total Float or Float. Write this number at the bottom right corner. If any activity on the critical path is delayed, the completion of the project will be delayed by an equal amount. This is a test for the null hypothesis that 2 independent samples have identical average (expected) values. 4. Draw a network diagram of activities for the project. The critical path of the. Here is how the Free Float given Indenpendent Float calculation can be explained with given input values -> 0. 49K views 2 years ago CPM and PERT | project management and planning. 2. - The Origins of. (activity on arrow) network with two events i,j, and an activity between them. 0 for float, "" for string, and the. the total float of the activities following it. Free Float (FF) = the maximum amount of time an activity can. If the current value is the result of a calculation, it must be a single-value, view-independent calculation. . Table 1. Independent float: This kind of float defines the amount of time you can put off completing a task before it affects the early start of dependent projects. In this work we apply MF-DFA method to compare multifractal behavior of various exchange rates during the periods of managed and independent float regimes. These two fractions have identical values, the. 71 A project has the following activities: Activity Duration (Days) 1-2 2 1-3 4 1-4 3 2-5 1 3-5. (6M) a) The network for a project is show below. This will help us get the critical path on our Schedule Network Diagram. This video explains how to calculate; total float, free float and independent float. which means, for any Calculation Date, an amount equal to the sum of : (x) for all Transactions with a Delivery Period beginning and ending on the next Business Day, $0 and (y) for all other Transactions, the sum of: (i) for each Fixed Price Power Transaction, twelve and a half percent (12. Independent float, IF(i,j), for activity (i,j) is calculated as:. Two sets of measurements. This video will explain the terms associated with the network analysis for cost scheduling. Note: In case negative value is. Float / Slack; Early Start, Early Finish, Late State, Late Finish Calculations; Or check out this playlist – Now that you know how to calculate Early Start, Early Finish, Late Start and Late Finish specifically from topic number 4, it is important to know that there are actually two ways to calculate these values,Interfering float and independent float also have to be restated, but total float calculation remains unchanged. OMEGA ™ laboratory rotameters are far more versatile. The use of total and free float. How to calculate. If the calculation's result could be more than one value, the workbook can't choose a default value. Independent Float Formula. All in all, if we now multiply the numbers we've obtained, we'll find that there are. Thus, floats represent following two points: Under-utilized resources; Flexibility of an activity. In this work we apply MF-DFA method to compare multifractal behavior of various exchange rates during the periods of managed and independent float regimes. Use of rand () We can generate random integers with the help of the rand () and srand () functions. Add your perspective Help others by sharing. . Total float is calculated using either the LS and ES values or the LF and EF values. What. It affects only preceding activities. The calculation of Free Float in a PDM network is more complex! These can actually be calculated with a simple formula. 2 Attributes of an Activity 5. Calculate the free float and interfering float for each of the activities show n in the activity network (Table 6. Backward pass. The format is highly flexible: float32 s can encode numbers as small as 1. of the existence of pseudo start and end events independent of the activity duration remain; refer Figure 3. ISBN: 9781305635203. 4 Activity Float and Schedules. Generally, it is measured in dots-per-inch (dpi). You can increase float on sub-critical tasks with standard project management techniques like: Reducing scope for the sub-critical task elements. We calculate the multifractal spectra and estimate the complexity parameters from four degree polynomial fit. They are independent of each other, which means that an activity can have different amount of free and total float. Currently, as indicated on the company’s balance sheet, its total outstanding common shares number 500,000 (50,000 of which are held by the CEO and CFO of the company) while 80,000 shares are held in treasury. " But let's move on to a more concrete meaning. Calculations Of Total float, free float, independent float, Earliest and latest time|OneStepToSucessCalculations Of Total float, free float, independent floa. Alternately, you can subtract the task’s earliest start (ES) date from its latest start (LS) date, like this: LS - ES = total float. Once a network has been drafted, it must be analysed. By definition: Total Float (TF) = the maximum amount of time an activity can be delayed from its early start without delaying the entire project. A large variance inflation factor (VIF) on an independent variable indicates a highly collinear relationship to the other variables that should be considered or adjusted for in the structure of. 5E-5 = 3974400-1987200. As this format is using base-2, there can be surprising differences in what numbers can be represented easily in decimal and which numbers can be represented in IEEE-754. Free float: It is the amount of time that the activity completion time can be delayed without affecting the earliest start time of the immediate successor. . Early Finish Time is the earliest point in time when the scheduled activity can complete. : 508 : 183 If a project network chart/diagram has 4 non-critical paths then that project would have 4 total float. These can actually be calculated with a simple formula. It does not affect start of succeeding activity i. Float or slack is the amount of time that a task in a project network can be delayed without causing a delay to subsequent tasks ("free float") and project completion date ("total float"). second of the two independent samples. Don’t forget to check out the video. This shows you that you can have up to nine days of delays without impacting subsequent tasks and still finish the overall project on time. Project Float. The float represents how much activity can be delayed without affecting the project completion time. 4×10 38 (both positive and negative). ES of activity F is calculated by adding 1 to the early finish of the predecessor activity. PERT chart for a project with five milestones (10 through 50) and six activities (A through F). Generally, the rotameter is a tube made of plastic, glass or metal combined with a float, which responds linearly to the flowrate of the fluid in that tube. Minimum project duration – Total float, free float, interfering float, safety float, independent float. You can add salt to the raw egg mixture, while the eggs are cooking, and even after they’ve cooked. Independent float is the maximum delay possible for an activity which used floats of preceding activity, but we will not affect the float of succeeding activity. Calculate theTotal Float (TF), Free Float (FF) and Independent Float (IF) for each activity, and organize. The calculation for Free Float = Ealy Start (successor) - Early Finish (predecessor) is unaffected, as this constraint type only impacts on. I am having difficulties rounding a float to two decimal places. Free Float: The amount that a task can move without affecting other tasks. EF is the early finish of the activity (days) ES is the early start of the successor activity (days) To calculate free float, subtract the early start of the successor activity from the. Q: The actively-traded securities exception from Rule 101 requires the public float value of the issuer's "common equity securities" to be at least $150 million. I have tried a few methods I have seen on here including simply just using Math. Critical activities, activities on the critical path, will always have zero slack. Independent float (INDF) The INDF is the maximum period you can delay an activity without affecting the subsequent task's earliest start date. Consequently, higher R-squared values indicate higher degrees of multicollinearity. Continue Reading. These bits are split between Byte 2 and Byte 3. The slack time, also known as float time, for an activity is the time between the earliest and latest start time. - Selection from Quantitative Techniques: Theory and Problems [Book] Float. To calculate total float, you need to perform a forward and backward pass on the network diagram, which involves calculating the earliest start date (ES) as the maximum of the earliest finish. The critical path method (CPM), or critical path analysis (CPA), is an algorithm. Interpret and report the t-test. Critical path, Total float, Free float, Independent float : Activity i-j, Name of Activity, Duration Example-1 online We use cookies to improve your experience on our site and to show you relevant advertising. Free Slack vs Total Slack. g. Independent Float: Relax or delay provided to any activity without affecting the Earliest Start Time (EST) of successor activity as well as Latest Finish Time (LFT) of the predecessor activity. Activity B on your network diagram has a most likely estimate of 8 days, a pessimistic estimate of 11 days, and an optimistic estimate of 6 days. The following example shows a comparison of each of the above functions applied to the same data set. 4 Critical Activities 6.