Strategy

Characteristics Planning w/ Dependent Req'ts (56)

Assembly Processing w/ Char. Planning (89)

Long Term Planning

no

LTP scenario

Components

No specific strategy group at component level

Strategy group 70, mixed MRP = 1

Creation of planned independent requirements

Active version

Inactive version

Consumption and reduction at header level

Allocation at configured material level, and indirectly (after MPR), reduction of all components

No allocation

Consumption and reduction at component level

Consumption at component level does not take place; however, requirements for components are indirectly reduced for all components after consumption at header level

Only components that are used in actual configuration are reduced

Example for reduction at component level:

Planned quantity 100 PC

Usage probability of combination value key A = 70%

Usage probability of combination value key B = 30%

Resulting in requirements for 70 PC of component A and 30 PC of component B

An order for 20 PC (featuring characteristic A) is entered resulting in:

The requirement for the components is changed to:

56 PC (80 PC * 70%) of component A and

24 PC (80 PC * 30%) of component B

An order for 20 PC (featuring characteristic A) is entered resulting in:

The requirement for the components is changed to:

50 PC (70 PC – 20 PC) of component A and

30 PC (30 PC – 0 PC) of component B

Strategy 56 w/ dependent req.

Strategy 89

General

Easier to handle (Batch run after completion of planning, monthly), especially if you cannot plan precisely or if you only want to plan capacity on header level

More precise planning of components

Better overview of component situation

Performance

MRP has to plan customer order AND planning of demands management all the time

Planning of demands management is done in LTP (typically only in the planning periode, for example a week or month) and independent of MRP