+ In the table below, job definitions, precedence relations, resource requirements, unit crash costs and crash limits for a chemical installation scheduling project are given. Daily working hours are 7:30 to 17:30 with a lunch break during 12:00-13:00. The chemical installation team gives a break on weekends and national and Muslim religious holidays. The project will start on April 17, 2023 at 7.30 hrs. Job No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Job Clear site Excavation and foundations Install support steelwork Install stairways Install platforms Install handrails and platform angles Install equipment Calibrate equipment Install prefabricated ductwork Install prefabricated process pipework Make pipework connections to equipment Install prefabricated service pipework Make service pipework connections to equipment Install instrumentation Make instrument connections to equipment Install electrical apparatus Make electrical connections to equipment Lay equipment Lay pipework Lay ductwork Testing equipment Painting Clean up Normal Duration (days) 4 8 10 3 8 7 4 7 22 10 4 7 7 3 6 15 4 9 6 10 13 6 8 Pred. 1 2 3 3 3 4,5,6 7 7 4,5,6 8, 10 4,5,6 8, 12 4,5,6 8, 14 4, 5, 6 8, 16 8 11, 13 9 18,19, 20 21 22 Worker 4 3 3 2 3 2 2 0 3 2 1 2 1 1 1 0 2 Resources 0 0 0 0 34 2 Operator 0 0 2 1 0 1 1 2 1 1 2 1 1 2 1 2 1 2 2 2 1 0 0 Crash Limit (days) 2 5 7 2 5 4 3 4 14 7 2 6 2 1 N6N 2 9 2 5 3 5 8 4 5 Crash Cost per day (TL) 2360 5300 3280 1900 5670 3780 3180 5260 6380 7000 4560 2340 1560 7500 3880 5820 1940 7800 6020 4680 2350 2890 1250 1) Report the project duration and the early and late start dates and total slack for the activities. 2) Draw the time/cost trade-off curve for the project and determine the optimal project duration. Assume unit indirect cost to be 3300 TL/hr. 3) The upper management has strictly ordered the project to be completed at its earliest possible duration. Reschedule the project by crashing the activities to achieve the objective set by the upper management with the least total cost.

In the table below, job definitions, precedence relations, resource requirenents, unit crash costs and crash limits for a chemical installation schedaling project are given. Daily working bours are 7:30 to 17:30 with a lunch break during 12:00-13:00. The chemical installation leam gives a break on weekends and national and Muslim religious holidays. The project will start on April 17. 2023 at 7.30 hrs. 1) Report the project durntion and the carly and late start dates and total slack for the activities. 2) Draw the time/cost trade-off curve for the project and determine the optimal project daration. Asame unit indirect cest to be 3300 Tlhhr. 3) The upper manazement has strictly ordered the project to be completed at its carliest possible duration. Reichedule the project by crashing the activities to achieve the objective set by the upper manageraent with the leait fotal cost