Page 186 - Orlicky's Material Requirements Planning

CHAPTER 9 System Records and Files 165

FIGURE 9-1
A Compact Format
Period
Time-phased
record: compact Lead Time: 3 1 2 3 4
and expanded
formats. Gross Requirements 10 15 75 17

Schedule Receipts 8 25
On Hand 72 70 55 5 –12
Planned-Order Releases 20

B Expanded Format
Period
Lead Time: 3 1 2 3 4

From Parent Items 10 10 15 12
Service Part Orders 5 5
Gross
Requirements
Interplant 60
Total 10 15 75 17

Supply Source A 25
Schedule 8
Receipts Supply Source B
Total 8 25
Planned-Order Receipts 20

Net Requirements 12
Stockroom #1 50 40 30 8
On Hand Stockroom #2 22 30 25 5
Total 72 70 55 5 8

Planned-Order Releases

will prove to be true in the typical manufacturing environment, and the single allocation
field is standard.
In exceptional cases where either orders must often be released prematurely for
some reason or the requirement for the different components of an assembly is staggered
over a long assembly lead time, the allocated quantities would be time-phased; that is, a
separate row of time buckets would be maintained. An example of this is shown in Figure
9-2. Note, in this example, that the use of a single allocation field would distort the com-
ponent item’s projected on-hand schedule (Figure 9-2B), which would then show 15 in