Question

Problem s (10 points) The Stone River Textile Mill was inspected by OSHA and found to be in violation of numir of safety regulations. The OSHA inspectors ordered the mill to alter some existing machinery to make it safer (add safety guards, etc.); purchase some new machinery to replace older, dangerous machinery, and relocate some machinery to make sfer e es and unobstructed entrances and exits. The mill determined the activities in the following table including their time duration precedence relationship, and crash rates Activity Activity Description Predecessor Crash rates Time Estimate 5500 $2500 $300 $400 b 15 Order new machinery Plan new physical layout Determine safety changes Receive equipment Hire new employees Make plant alterations Make changes in existing machinery Train new employees Install new machinery Relocate old machinery Conduct employee safety orientation 3 4 de der d, e, f, h, i, j $500 53600 $100 $90 $1800 S2000 $5500 5 i 2 construct the project network for this project and determine the following 1. What is the project completion time? 2. How many critical path(s) are there? 3. Identify the critical path(s) 4. What is the earliest finish time for activity h? 5. What is the earliest finish time for activity i? 6. What is the earliest finish time for activity j? 7. What is the latest finish time for activity a? 3. What is the latest finish time for activity d? What is the latest finish time for activity e? 0. If you want to finish this project one day earlier than your computed completion time which activity should you crash?
attached is the question!!

Answer 1

Activity Duration EST T T | 10] 7| 15]. শুনিলালারিনি। | লন্নালালারিনি| লালভিনিনিনিনিমি |||||||||||||| h | 3| | 2| ESTE EFT LST L LFT of Tail E ST+D of head LST- D Earliest start time Earliest finish time Latest start time l atest finish time Critical path-BFJK Actvity to be crashed by 1 day i.e least crash cost activity on critical path Activity

D ):2015 L=20 し:25 La27 til ロー3