Mr. Ram Naresh has six jobs waiting to be processed through his machine. Processing tiime (in days) and due date information for each job are as follows :

Job Processing Time Due Date
A             2         3
B             1         2
C             4         12
D             3         4
E             4         8
F             5         10

Sequence the jobs by FCFS, SPT, SLACK and DDATE.

Calculate the average completion time and average tarbiness of the six jobs under each sequencing rule. Which rule would you recommend ?

Complete the following MRP matrix for item X:

Item: X LLC:1

LT : 2 Let size : min 50

1       2       3         4      5            6 7        8      

   Gross Requirement

Scheduled receipts

Project on hand (10)

Net Requirement

Planned order receipts

planned order releases

20

30

50

50 50 60 90 40 60

 

In what perios orders be released and what should be the size of these orders ?

 

 

 

 

A manufacture has the following information on its major product.

Regular time production capacity = 2600 units/period

Overtime production costs = Rs. 12/unit

Inventory costs = Rs. 2 unit/period

Backlog costs = Rs. 5/unit/period

Beginning inventory  = 400 units

        Demand (in units) for period 1,2,3,4 is 4000 , 3200, 2000 and 2500 respectively. Develop a level output plan that filed zero inventory at the end of period 4, What costs result from this plant ?