Problem solving

Time control

Exercise 1 The project is the following: We have to create a prototype of some kind of a machine. The first step is planning the whole process (activity a, the expected duration is 5 days), than came the design phase (activity b, 6 days). Manufacturing is the third step (activity c, 7 days), and then an assembly process (activity d, 2 days). The project closes with a testing phase (activity e, 4 days). Plot the Gantt chart of the project. After 15 days, a and b are ready but nothing else. Identify/calculate PTPT, ATWP, SPI, PTWP, PTC, ETC, ETPT, expected time slip.

Solution of ex. 1 PTPT = 5 + 6 + 7 + 2 + 4 = 24 calendar days ATWP = 15 calendar days (= working days) PTWP = 5 + 6 = 11 working days SPI = 11/15 = 73.33% PTC = 24 working days – 11 working days = 13 wd ETC = 13 / (11/15) = 17.73 working days ETPT = 15 + 17.73 = 32.73 ≈ 33 working days also ETPT = 24 / (11/15) = 32.73 ≈ 33 calendar days Expected time slip = 24 – 33 = -9 calendar days

Exercise 2 There is a project with the following planned data. The schedule-plan is presented in the table below. After 8 days the actual monitoring report on progress: ’a’ 100% complete, ’b’ is 100% complete, ’c’ is 33.33% complete, d & e are at 0%. It is possible to start an activity without finishing any other (there is no precedence relationship in the project). a) What is the planned time to complete (PTC) the project? b) Calculate the schedule performance index (SPI). c) What is the estimated time to complete (ETC) the project? d) What is the estimated TPT? e) What is the estimated time slip for the whole project? Activity label Duration Planned start a 4 b c 3 8 d 11 e 2 14

Exercise 3 There is a project with the following planned data. The schedule-plan is presented in the table below. After 6 days the actual monitoring report on the progress of the project: ’a’ 75% complete, ’b’ is 50% complete, ’c’ & e are at 0%. It is possible to start an activity without finishing any other (there is no precedence relationship in the project). a) What is the planned time to complete (PTC) the project? b) Calculate the schedule performance index (SPI). c) What is the estimated time to complete (ETC) the project? d) What is the estimated TPT? e) What is the estimated time slip for the whole project? Activity label Duration Planned start a 4 b 2 c 6 d 10

Cost control

Cost of the whole activity Exercise 1 There is asmall project with the following network diagram: a b e c d The following table contains the information on the activity durations and costs: Activity label Duration (day) Cost of the whole activity a 3 60 b 4 120 c 2 100 d 90 e Plot a Gantt chart from the information above and calculate the BCWS for every day of the project.

Exercise 1 The project manager receives a progress report of the first 5 days, with the following information: Activity ‘a’ is completed in 3 days, it costed 75 25% of activity ‘b’ is completed during 2 days, 30 was paid Half of activity ‘c’ is ready (time spent was 2 days), costs were 60 Activity ‘d’ and ‘ e’ are not started Calculate BCWP and ACWP for the first 5 days Calculate CPI, SPI, BCC, ECC, FCC, the estimated overspending, PTC, ETC, ETPT and the estimated slip. Calculate the Earned Value for the first 5 days. Plot the S curves of actual, planned and earned values for the project.

Exercise 2 There is a 4 weeks long project with the following cost data, after 2 weeks: Calculate the ‘schedule variance in cost terms’, the ‘cost variance’, the ‘schedule performance index’ (SPI) and the ‘cost performance index’ (CPI) for the first two weeks.   1st week 2nd week 3rd week 4th week BCWS €200 €100 BCWP €150 €120 ACWP

Total cost of the activity Exercise 3 There is a project with the following planned data: Activity label Duration (day) Total cost of the activity a 3 150 b 2 200 c 300 d e 100 a b d e c Calculate the BCWS data for the whole project (activities placed to their ESTs)! After 5 days, the monitoring system provides the following information: Activity ‘a’ is completed Activity ‘b’ is at 50% Activity ‘c’, ‘d’ and ’e’ are 0% completed (not even started) Money spent: 300 Calculate BCWS, BCWP and ACWP for the first 5 days Calculate CPI, SPI, BCC, ECC and FCC

Daily cost of the activity Exercise 4 There is a project with the following planned data: Activity label Duration (day) Daily cost of the activity Predecessor a 3 150 - b 2 200 c 100 d e f 1 250 c, e Calculate the BCWS data for the whole project (activities placed to their ESTs)! After 6 days, the monitoring system provides the following information: Activity ‘a’ is completed Activity ‘b’ is completed Activity ‘c’ is at 67% ‘d’, ’e’ and ’f’ are 0% completed (not even started) Money spent: 1000 Calculate BCWS, BCWP and ACWP for the first 6 days Calculate CPI, SPI, BCC, ECC and FCC