Page 494 - Orlicky's Material Requirements Planning

CHAPTER 27 Highly Visible and Collaborative Execution 471

FIGURE 27-22

Open supply activity for Part PLC with projected on-hand position.
Part #: PPC PBS: 75% in 3 Days Today’s Date: 5/20
Order # Quantity Projected Request Promise Status
PO 624-71 20 45 5/23 5/24 In process at supplier
PO 625-36 20 45 5/28 5/28 In process at supplier

FIGURE 27-23
Projected on-hand balance for Part PPC.

Projected Buffer Status
50
Projected On-Hand Balance 30 On-Hand
40
TOR = 40

20
Alert = 20

10
PPC
0
5/20 5/21 5/22 5/23 5/24 5/25 5/26 5/27 5/28 5/29 5/30

Days Forward

Note that all the preceding alerts still incorporate and/or use due dates in some
way. This may appear to be a contradiction from the stated need to move away from pri-
ority by due date. Instead, this demonstrates that due dates, with regard to buffered
items, should be a secondary factor in determining priority and/or expedite activity. In
each case, the primary priority focus came from buffer status. The analysis after that iden-
tification brought due dates and other information such as status into the equation.

SYNCHRONIZATION ALERTS
Synchronization alerts will cover non-buffered parts and in some cases buffered parts as
well. Since there is no buffer for these parts, there is less slack with which companies have
to work. The timing and synchronization associated with these parts require tools that
promote visibility to potential problems before they happen. Synchronization alerts
depend heavily on due dates. There are two types of synchronization alerts.