9. The Stone River Textile Mill was inspected by OSHA and found to be in violation of a number of safety regulations. The OSHA inspectors ordered the mill to alter some existing machinery to make it safer (e.g., add some safety guards); purchase some new machinery to replace older, dangerous machinery; and relocate some machinery to make safer passages and unobstructed entrances and exits. OSHA gave the mill only 35 weeks to make the changes; if the changes were not made by then, the mill would be fined $300,000. The mill determined the activities that would have to be completed and then estimated the indicated activity times, as shown in the table below.Activity DescriptionImmediate Predecessor(s)Time Estimates (Weeks)OptimisticMost LikelyPessimisticambAOrder new machinery---123BPlan new physical plant---258CDetermine safety changes in existing machinery---135DReceive equipmentA41025EHire new employeesA3712FMake plant alterationsB101525GMake changes in existing machineryC5914HTrain new employeesD, E237IInstall new machineryD, E ,F146JRelocate old machineryD, E, F, G2510KConduct employee safety orientationH, I, J222Construct the PERT network for this project and determine the follow:Expected activity times and their variancesExpected earliest and latest activity times and activity slackExpected critical pathExpected project duration and varianceThe probability that the mill will be fined $300,000.Show detail breakdown

Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Answered: Construct the PERT network for this…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

See similar textbooks

Related questions

Question

9. The Stone River Textile Mill was inspected by OSHA and found to be in violation of a number of safety regulations. The OSHA inspectors ordered the mill to alter some existing machinery to make it safer (e.g., add some safety guards); purchase some new machinery to replace older, dangerous machinery; and relocate some machinery to make safer passages and unobstructed entrances and exits. OSHA gave the mill only 35 weeks to make the changes; if the changes were not made by then, the mill would be fined $300,000. The mill determined the activities that would have to be completed and then estimated the indicated activity times, as shown in the table below.

Activity	Description	Immediate Predecessor(s)	Time Estimates (Weeks)
Optimistic	Most Likely	Pessimistic
a	m	b
A	Order new machinery	---	1	2	3
B	Plan new physical plant	---	2	5	8
C	Determine safety changes in existing machinery	---	1	3	5
D	Receive equipment	A	4	10	25
E	Hire new employees	A	3	7	12
F	Make plant alterations	B	10	15	25
G	Make changes in existing machinery	C	5	9	14
H	Train new employees	D, E	2	3	7
I	Install new machinery	D, E ,F	1	4	6
J	Relocate old machinery	D, E, F, G	2	5	10
K	Conduct employee safety orientation	H, I, J	2	2	2