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<ManualTopic ID="/baanerp/cp/onlinemanual/000039" xml:lang="en">
	<Header>
		<Title xmlns:ssa="http://www.ssaglobal.com" xmlns:HTML="http://www.w3.org/TR/REC-html40">Online ATP update</Title>
		<Keyword><Level1>Online ATP update</Level1>
		</Keyword>
		<Keyword><Level1>CTP</Level1>
			<Level2>online ATP update</Level2>
		</Keyword>
		<Keyword><Level1>ATP</Level1>
			<Level2>online ATP update</Level2>
		</Keyword>
	</Header>
	<GeneralSection><List><ListIntro>If the <Link href="/baanerp/cp/glossary/glossary#000030" role="glossary">ATP</Link> is to be used to support order acceptance, it must be kept up-to-date. You can choose between two methods to update the ATP:</ListIntro>
			<ListItem>Online update, carried out when a planned or actual inventory transaction is recorded.</ListItem>
			<ListItem>Offline update, carried out when the item master plan is updated.</ListItem>
		</List>
		<GeneralSection><SectionTitle>Online update of ATP</SectionTitle>
			<Paragraph>You can enable online ATP updates by selecting the <GUIRef href="/baanerp/cp/rpd/cprpd0100m000#cprpd000.onat" role="formfield">Online ATP Update in EP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd0100m000" role="session">EP Parameters (cprpd0100m000)</GUIRef> session.</Paragraph>
			<Paragraph>Next, select the <GUIRef href="/baanerp/cp/rpd/cprpd0100m000#cprpd000.onat" role="formfield">Online ATP Update in EP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session for each item for which you want the ATP to be updated online.</Paragraph>
			<Paragraph>SSA ERP updates the ATP over the entire planning horizon, but only in the <Link href="/baanerp/cp/glossary/glossary#000093" role="glossary">actual scenario</Link>.</Paragraph>
			<Paragraph>If necessary, SSA ERP also updates the ATP of components for which you selected the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.cria" role="formfield">Critical in CTP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session, and/or the capacity CTP of the resources for which you selected the <GUIRef href="/baanerp/cp/rpd/cprpd2100m000#cprpd200.cria" role="formfield">Critical in CTP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd2100m000" role="session">Resource (cprpd2100m000)</GUIRef> session.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Offline update of ATP</SectionTitle>
			<Paragraph>You can always recalculate the ATP of items manually, by updating the <Link href="/baanerp/cp/glossary/glossary#000019" role="glossary">item master plan</Link>.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Forecast consumption</SectionTitle>
			<Paragraph>When the ATP is updated online, <GUIRef href="/baanerp/cp" role="package">Enterprise Planning</GUIRef> also applies forecast consumption. The result can differ from the normal consumption procedure during a master-plan update, because during an ATP update, the consumption always remains within the bounds of one plan period. In other words, no backward or forward consumption is used.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Plan items without an item master plan</SectionTitle>
			<Paragraph>If an item does not have an item master plan, the ATP is not stored, but is always computed online, like the ATP information in the <GUIRef href="/baanerp/cp/rrp/cprrp0520m000" role="session">Item Order Plan (cprrp0520m000)</GUIRef> session.</Paragraph>
		</GeneralSection>
	</GeneralSection>
	<RelatedTopics><SectionTitle>Related topics</SectionTitle>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000115" role="manual">Capable-to-promise, an overview</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000086" role="manual">To maintain an item master plan</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000133" role="manual">Forecast Consumption with an Item Master Plan</Link>
		</RelTopic>
	</RelatedTopics>
</ManualTopic>
