Page 470 - Orlicky's Material Requirements Planning

448 PART 4 Looking Backward and Forward

FIGURE 26-17

Order release date versus demand date.
Part 123 Today’s Date: 06/01 ASRLT = 30 Days
Actual Demand Order Due Dates and Quantities

150
100 Quantity
50

Order Release Dates

June 30 July 31 August 31 September 30

a time line. Note that the current day is June 1. It is important to note that this initial date
is irrespective of quantity/capacity. It is simply driven by the ASRLT in the part’s bill of
material (BOM). Once the order with due date and quantity is sent to capacity require-
ments planning (CRP), a different release and/or promise date may be assigned to deal
with capacity limitations. Figure 26-18 is what the planner would see in relation to Part
123’s planning screen.
This example is a relatively simple one illustrating the materials scheduling effect
with a nonbuffered parent item only. A more complex example with a nonbuffered part
has a BOM comprised completely of nonbuffered parts. In Figure 26-19, the BOM is dis-
played in a horizontal rather than the traditional vertical fashion. This view provides

FIGURE 26-18
Part: 123 ASRLT = 30 Days
Planning screen Demand Quantity Due Date Release Date
for Part 123.
SO# 1234 50 6/30 6/02
SO# 1235 100 7/13 6/14
SO# 1236 125 7/15 6/16
SO# 1237 155 8/06 7/07
SO# 1238 75 8/20 7/21
SO# 1240 155 9/12 8/13
SO# 1241 75 9/23 8/24