Lean Systems, Process & Operations class need within next 6 hrs

Chapters 15 & 16 Homework (SCM 488)

1. In manufacturing, we typically schedule the final operation 1st to meet the due date. Prior steps in the sequence of work (i.e. routing) are scheduled _______________

2. Finite loading depends on knowing capacity and actual work center performance to achieve Input-Output Control. Please complete the below Input-Output Chart. What problems are apparent to you?

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

week	1	2	3	4
planned input	200	200	200	200
actual input	180	190	170	180
cumulative deviation	-20	?	?	?
planned output	200	200	200	200
actual output	180	170	160	150
cummulative deviation	-20	?	?	?
cumulative change in backlog	0	?	?	?

3. Gantt Load & Schedule Charts are effective ways to show loading, idle times & jobs in process. Based on the below, when does job A need to finish_____________? What days of the week could we do maintenance in the electronics work center.

4. The assignment method allocates tasks to minimize cost (or time). You have 3 operators who can each do 3 different jobs. Which jobs should be assigned to which operators?

	Operator 1	Operator 2	Operator 3
Job A	10	12	4
Job B	12	4	9
Job C	8	8	5

5. You are managing a production shop which involves 4 operations. You decide to sequence the jobs by due. What is the average completion time__________, utilization_____________, average # of jobs in the system____________,and average job lateness_____________.

Job	Process time (days)	Job Due Date (Days)
1	3	6
2	5	5
3	2	18
4	9	7

6. For the above table, your production manager has a different idea. She’d like to sequence by shortest processing time. What is the average completion time__________, utilization_____________, average # of jobs in the system____________,and average job lateness_____________.

7. For the two methods, which performed best for utilization?_________________________

8. Today is the 7th. You are a plant manager in a plant making parts for an automotive customer. If your parts are late you are charged a financial penalty. For your plant, jobs are scheduled to minimizing average job lateness using a critical ratio (CR).

Job	Date Due	Days needed to fill order
1	15	2
2	19	5
3	13	3

What is the CR of each job. Which needs to be done 1st?

9. You would like to use a kanban system. Wait time + material handling time + process time is 7 days. Daily demand is 500 units and your EOQ is 250 units. How many bins do you need?

10. You are value stream mapping the following 3 step production process. What is the time needed for each step to produce 1000 pieces? Using total production time, process time and available work time what is the value added time %______________?