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Exhibit B: Demand Netting Logic >
Partial Week Processing
Partial Week Processing
When calculating the master schedule quantities, as explained above, Master Scheduling nets by weekly quantities. When one week covers two periods (a period begins sometime in the middle of the week), the netting process must take into account the possible different projected demand quantities for the two periods when netting for the week.
For this partial week processing, the week is divided into two sections, one in each period. A fraction of the full week's demand for the period is then allocated to each section. The total forecast for the week is then calculated from the sum of these two sections.
This example illustrates how the system allocates demand to a week that encompasses two periods with different projected demand quantities.
EXAMPLE:
Assumptions:
· Period 1: 23 working days; Projected Demand = 230
· Period 2: 22 working days; Projected Demand = 440
Therefore,
· Daily rate for period 1 = 230/23 = 10 per day
· Daily rate for period 2 = 440/22 = 20 per day
For this example, there is no consumable demand, and the weeks are before the demand fence date.
1. The breakdown of the demand by week is as follows:
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1
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5
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50
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5
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50
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|
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2
|
5
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50
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5
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50
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3
|
5
|
50
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5
|
50
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4
|
5
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50
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5
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50
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5
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3
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30
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2
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40
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5
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70
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6
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5
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100
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5
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100
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7
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5
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100
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5
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100
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8
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|
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5
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100
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5
|
100
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|
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9
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|
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5
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100
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5
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100
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2. Netting then proceeds as before, with one difference: if a consumable demand is allocated for that week, the remaining demand to be allocated is reduced by only a fraction of the consumable demand. This fraction equals the number of days in the week in this period divided by the number of days in a week (2/5 for period 2 above).