<?xml version="1.0" encoding="utf-8"?>
<ManualTopic ID="/baanerp/cp/onlinemanual/000117" xml:lang="en">
	<Header>
		<Title xmlns:ssa="http://www.ssaglobal.com" xmlns:HTML="http://www.w3.org/TR/REC-html40">Component CTP reservations</Title>
		<Keyword><Level1>Component CTP reservations</Level1>
		</Keyword>
		<Keyword><Level1>CTP</Level1>
			<Level2>reservations</Level2>
		</Keyword>
		<Keyword><Level1>ATP</Level1>
			<Level2>CTP reservations</Level2>
		</Keyword>
	</Header>
	<GeneralSection><Paragraph>SSA ERP calculates CTP reservations when a plan item's ATP is updated, or when an item master plan is updated.</Paragraph>
		<GeneralSection><SectionTitle>Component CTP reservation</SectionTitle>
			<List><ListIntro>SSA ERP generates a <Link href="/baanerp/cp/glossary/glossary#000042" role="glossary">component CTP reservation</Link> in the following situation:</ListIntro>
				<ListItem>The <Link href="/baanerp/cp/glossary/glossary#000040" role="glossary">cumulative ATP</Link> of a plan item in a particular plan period becomes negative.</ListItem>
				<ListItem>You selected the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.coat" role="formfield">Component CTP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session for the plan item involved.</ListItem>
				<ListItem>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 for (one or more) component items of the plan item.</ListItem>
				<ListItem>You entered a <Link href="/baanerp/td/glossary/glossary#SalesOrder.td" role="glossary">sales order</Link>, and the cumulative ATP of the end item and/or the cumulative ATP of one or more components is not enough.</ListItem>
			</List>
		</GeneralSection>
		<Note><SectionTitle>Note</SectionTitle>
			<Paragraph>When component CTP reservations and/or capacity CTP reservations are made for a plan item, the cumulative ATP of the item itself is reset to zero.</Paragraph>
		</Note>
		<GeneralSection><SectionTitle>Calculation</SectionTitle>
			<Paragraph>The component CTP reservation is computed as follows:</Paragraph>
			<Formula><Paragraph UserLevel="Novice" UserType="Taskuser">CCR(t) = -NA(t) x	 RQ(t)</Paragraph>
			</Formula>
			<TABLE border="1"><TBODY><TR><TD>CCR(t)</TD>
						<TD>component CTP reservation</TD>
					</TR>
					<TR><TD>NA(t)</TD>
						<TD>negative ATP</TD>
					</TR>
					<TR><TD>RQ(t)</TD>
						<TD>required quantity</TD>
					</TR>
				</TBODY>
			</TABLE>
			<Paragraph>The requirement date for the component CTP reservation for a critical material is determined as follows:</Paragraph>
			<Formula><Paragraph UserLevel="Novice" UserType="Taskuser">RD = PFD - LTO</Paragraph>
			</Formula>
			<TABLE border="1"><TBODY><TR><TD>RD</TD>
						<TD>requirement date for the component CTP reservation</TD>
					</TR>
					<TR><TD>PFD</TD>
						<TD>finish date of the originating plan period</TD>
					</TR>
					<TR><TD>LTO</TD>
						<TD>lead-time offset</TD>
					</TR>
				</TBODY>
			</TABLE>
			<Paragraph>SSA ERP converts the lead-time offset from workdays to calendar days. See <Link href="/baanerp/cp/onlinemanual/000087" role="manual">Workdays and calendar days in Enterprise Planning</Link>.</Paragraph>
			<Paragraph>SSA ERP records the component CTP reservation in the plan period in which the requirement date falls. The component CTP reservations are subtracted from the (component) item's ATP.</Paragraph>
			<Paragraph>You can view component CTP reservations and their origin in the <GUIRef href="/baanerp/cp/rrp/cprrp0111m000" role="session">CTP Reservations (cprrp0111m000)</GUIRef> session. This session is accessible through the <GUIRef href="" role="menu">Specific</GUIRef> menu of the <GUIRef href="/baanerp/cp/rmp/cprmp2101m000" role="session">Item Master Plan (cprmp2101m000)</GUIRef> session.</Paragraph>
		</GeneralSection>
	</GeneralSection>
	<RelatedTopics><SectionTitle>Related topics</SectionTitle>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000037" role="manual">Types of ATP and CTP checks</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000123" role="manual">Component CTP</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000118" role="manual">To compute item ATP</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000116" role="manual">CTP Checking Procedure</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000312" role="manual">Capacity CTP reservations</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000332" role="manual">To compute cumulative ATP</Link>
		</RelTopic>
	</RelatedTopics>
</ManualTopic>
