To use a rolling scenario

If a scenario is defined as a rolling scenario in the Scenarios (cprpd4100m000) session, LN regularly shifts the entire scenario a particular interval forward in time.

Diagram

The following diagram illustrates the rolling procedure. In this example, the rolling frequency is 7 days.

A	Start date
B	Reference date
C	Current date
D	Finish date

How to roll a scenario

Use the Initialize, Roll, and Update Scenario (cprpd4200m000) session to roll a scenario. If you select a scenario that needs to be rolled, LN automatically performs a full update for that scenario:

Shift the scenario forward.
Update all item master plans and channel master plans, including the goods-flow data, and critical material and capacity requirements.
Rebuild all resource master plans.

If a multisite scenario is rolled, LN also rolls all local scenarios that belong to the multisite scenario.

Note

A scenario needs to be rolled if the current date is greater than the reference date plus the rolling frequency.

Overview of the procedure

LN shifts the scenario forward by the number of days specified in the Rolling Frequency field in the Scenarios (cprpd4100m000) session. The following fields in this session are updated:

Scenario Start Date
Scenario Finish Date
Reference Date

Note that this update also affects the plan-period dates. LN updates these dates in all item master plans and channel master plans that are present in the scenario.

Because plan periods can be of unequal length, a special procedure is needed to redistribute the master-plan data over the new plan periods.

Step 1

LN disaggregates the master-plan quantities of the rolling scenario (for example, the production-plan quantities) over the calendar days of the relevant plan period. This disaggregation is based on the company calendar: for a detailed description, see To distribute master-plan quantities over calendar days.

Step 2

LN aggregates the quantities of each day to the new plan periods.