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<ManualTopic ID="/baanerp/cp/onlinemanual/000150" xml:lang="en">
	<Header>
		<Title xmlns:ssa="http://www.ssaglobal.com" xmlns:HTML="http://www.w3.org/TR/REC-html40">To use a rolling scenario</Title>
		<Keyword><Level1>Rolling scenario</Level1>
		</Keyword>
	</Header>
	<GeneralSection><Paragraph>If a scenario is defined as a rolling scenario in the <GUIRef href="/baanerp/cp/rpd/cprpd4100m000" role="session">Scenarios (cprpd4100m000)</GUIRef> session, SSA ERP regularly shifts the entire scenario a particular interval forward in time.</Paragraph>
		<GeneralSection><SectionTitle>Diagram</SectionTitle>
			<Paragraph></Paragraph>
			<Paragraph>The following diagram illustrates the rolling procedure. In this example, the rolling frequency is 7 days.</Paragraph>
			<Figure><HTML:IMG SRC="../images/tr_graph_000150.gif" height="432" width="432" xmlns:ssa="http://www.ssaglobal.com" xmlns:HTML="http://www.w3.org/TR/REC-html40"/><FigLegend><LegendEntry><Symbol>A</Symbol>
						<Desc>Start date</Desc>
					</LegendEntry>
					<LegendEntry><Symbol>B</Symbol>
						<Desc>Reference date</Desc>
					</LegendEntry>
					<LegendEntry><Symbol>C</Symbol>
						<Desc>Current date</Desc>
					</LegendEntry>
					<LegendEntry><Symbol>D</Symbol>
						<Desc>Finish date</Desc>
					</LegendEntry>
				</FigLegend>
			</Figure>
		</GeneralSection>
		<GeneralSection><SectionTitle>How to roll a scenario</SectionTitle>
			<List><ListIntro>Use the <GUIRef href="/baanerp/cp/rpd/cprpd4200m000" role="session">Initialize, Roll, and Update Scenario (cprpd4200m000)</GUIRef> session to roll a scenario. If you select a scenario that needs to be rolled, SSA ERP automatically performs a full update for that scenario:</ListIntro>
				<ListItem>Shift the scenario forward.</ListItem>
				<ListItem>Update all item master plans and channel master plans, including the goods-flow data, and critical material and capacity requirements.</ListItem>
				<ListItem>Rebuild all resource master plans.</ListItem>
			</List>
			<Paragraph>If a multisite scenario is rolled, SSA ERP also rolls all local scenarios that belong to the multisite scenario.</Paragraph>
		</GeneralSection>
		<Note><SectionTitle>Note</SectionTitle>
			<Paragraph>A scenario needs to be rolled if the current date is greater than the <Link href="/baanerp/cp/glossary/glossary#000022" role="glossary">reference date</Link> plus the <Link href="/baanerp/cp/glossary/glossary#000021" role="glossary">rolling frequency</Link>.</Paragraph>
		</Note>
		<GeneralSection><SectionTitle>Overview of the procedure</SectionTitle>
			<List><ListIntro>SSA ERP shifts the scenario forward by the number of days specified in the <GUIRef href="/baanerp/cp/rpd/cprpd4100m000#cprpd400.rofr" role="formfield">Rolling Frequency</GUIRef> field in the <GUIRef href="/baanerp/cp/rpd/cprpd4100m000" role="session">Scenarios (cprpd4100m000)</GUIRef> session. The following fields in this session are updated:</ListIntro>
				<ListItem><GUIRef href="/baanerp/cp/rpd/cprpd4100m000#cprpd400.plsd" role="formfield">Scenario Start Date</GUIRef>
				</ListItem>
				<ListItem><GUIRef href="/baanerp/cp/rpd/cprpd4100m000#cprpd400.plfd" role="formfield">Scenario Finish Date</GUIRef>
				</ListItem>
				<ListItem><GUIRef href="/baanerp/cp/rpd/cprpd4100m000#cprpd400.reda" role="formfield">Reference Date</GUIRef>
				</ListItem>
			</List>
			<Paragraph>Note that this update also affects the plan-period dates. SSA ERP updates these dates in all item master plans and channel master plans that are present in the scenario.</Paragraph>
			<Paragraph>Because plan periods can be of unequal length, a special procedure is needed to redistribute the master-plan data over the new plan periods.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Step 1</SectionTitle>
			<Paragraph>SSA ERP 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 <Link href="/baanerp/cp/onlinemanual/000132" role="manual">To distribute master-plan quantities over calendar days</Link>.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Step 2</SectionTitle>
			<Paragraph>SSA ERP aggregates the quantities of each day to the new plan periods.</Paragraph>
		</GeneralSection>
	</GeneralSection>
	<RelatedTopics><SectionTitle>Related topics</SectionTitle>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000044" role="manual">Scenarios in Enterprise Planning</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000302" role="manual">Plan periods in Enterprise Planning</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000148" role="manual">Multisite planning</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000132" role="manual">To distribute master-plan quantities over calendar days</Link>
		</RelTopic>
	</RelatedTopics>
</ManualTopic>
