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<ManualTopic ID="/baanerp/cp/onlinemanual/000118" xml:lang="en">
	<Header>
		<Title xmlns:ssa="http://www.ssaglobal.com" xmlns:HTML="http://www.w3.org/TR/REC-html40">To compute item ATP</Title>
		<Keyword><Level1>Item ATP</Level1>
			<Level2>computing</Level2>
		</Keyword>
		<Keyword><Level1>CTP</Level1>
			<Level2>computing item ATP</Level2>
		</Keyword>
		<Keyword><Level1>ATP</Level1>
			<Level2>computing item ATP</Level2>
		</Keyword>
	</Header>
	<GeneralSection><List><ListIntro>In the <GUIRef href="/baanerp/cp/rmp/cprmp2101m000" role="session">Item Master Plan (cprmp2101m000)</GUIRef> session, several fields give an indication of the item quantity that is still available at a certain point in time:</ListIntro>
			<ListItem><GUIRef href="/baanerp/cp/rmp/cprmp2101m000#cprmp300.astc" role="formfield">Projected Inventory</GUIRef>.</ListItem>
			<ListItem><GUIRef href="/baanerp/cp/rmp/cprmp2101m000#cprmp300.avtp" role="formfield">ATP</GUIRef>.</ListItem>
			<ListItem><GUIRef href="/baanerp/cp/dsp/cpdsp5130m000#cprmp300.atpc" role="formfield">Cumulative ATP</GUIRef>.</ListItem>
		</List>
		<Paragraph>The <Link href="/baanerp/cp/glossary/glossary#000046" role="glossary">projected inventory</Link> shows the inventory level as it is expected on the basis of the previous inventory, the expected demand, and the planned supply. For more information, refer to the topic <Link href="/baanerp/cp/onlinemanual/000139" role="manual">To compute the projected inventory</Link>.</Paragraph>
		<List><ListIntro>The <Link href="/baanerp/cp/glossary/glossary#000030" role="glossary">available to promise (ATP)</Link> is an indicator of inventory availability that is specifically geared to the process of order acceptance. In the <GUIRef href="/baanerp/cp/rmp/cprmp2101m000" role="session">Item Master Plan (cprmp2101m000)</GUIRef> session, the ATP is shown in two formats:</ListIntro>
			<ListItem>The <Link href="/baanerp/cp/glossary/glossary#000030" role="glossary">ATP</Link> for one plan period.</ListItem>
			<ListItem>The <Link href="/baanerp/cp/glossary/glossary#000040" role="glossary">cumulative ATP</Link>.</ListItem>
		</List>
		<GeneralSection><SectionTitle>Computing the ATP for one plan period</SectionTitle>
			<Paragraph>The ATP for one plan period is a value of zero or higher, which indicates how much of the planned supply for a plan period is not already used to cover actual demand.</Paragraph>
			<List><ListIntro>The total planned supply for a plan period is displayed in the <GUIRef href="/baanerp/cp/rmp/cprmp2101m000#tot.receipts" role="formfield">Total Receipts</GUIRef> field in the <GUIRef href="/baanerp/cp/rmp/cprmp2101m000" role="session">Item Master Plan (cprmp2101m000)</GUIRef> session, and is equal to the sum of:</ListIntro>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000018" role="glossary">Production plan</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000047" role="glossary">Planned production orders</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000122" role="glossary">Scheduled production receipts</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000023" role="glossary">Purchase plan</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000048" role="glossary">Planned purchase orders</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000123" role="glossary">Scheduled purchase receipts</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000049" role="glossary">Planned distribution orders</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000124" role="glossary">Scheduled distribution receipts</Link>.</ListItem>
			</List>
			<List><ListIntro>The total actual demand is equal to the sum of:</ListIntro>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000112" role="glossary">Customer orders</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000119" role="glossary">Dependent material demand</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000120" role="glossary">Dependent scheduled demand</Link>.</ListItem>
				<ListItem><Link href="/baanerp/cp/glossary/glossary#000121" role="glossary">Dependent distribution demand</Link>.</ListItem>
			</List>
			<List><ListIntro>For the current plan period and each subsequent period within the <Link href="/baanerp/cp/glossary/glossary#415" role="glossary">ATP/CTP horizon</Link>, the ATP is computed as follows:</ListIntro>
				<ListItem>For the current plan period, the <Link href="/baanerp/wh/glossary/glossary#000330" role="glossary">on-hand inventory</Link> is added to the ATP.</ListItem>
				<ListItem>If the result of the ATP computation is negative, the ATP for that plan period is set to zero.</ListItem>
				<ListItem>Part of the item's ATP within a plan period can be reserved as a so-called component CTP reservation. See <Link href="/baanerp/cp/onlinemanual/000117" role="manual">Component CTP reservations</Link>. In this case, this CTP reservation is subtracted from the ATP of the (component) item.</ListItem>
			</List>
		</GeneralSection>
		<GeneralSection><SectionTitle>CTP reservations</SectionTitle>
			<Paragraph>If component and/or capacity CTP checks are enabled for a plan item, this influences the way in which SSA ERP deals with negative ATP levels when it updates the ATP.</Paragraph>
			<List><ListIntro>If the cumulative ATP of such a plan item becomes negative, the negative ATP level is passed on to:</ListIntro>
				<ListItem>The item's CTP-critical components, as a <Link href="/baanerp/cp/glossary/glossary#000042" role="glossary">component CTP reservation</Link>.</ListItem>
				<ListItem>The item's CTP-critical resources, as a <Link href="/baanerp/cp/glossary/glossary#000041" role="glossary">capacity CTP reservation</Link>.</ListItem>
			</List>
			<Paragraph>In this case, the additionally produced quantity of the item itself is stored as CTP reservation receipts.</Paragraph>
			<Paragraph>CTP reservations are subtracted from a component item's ATP or a resource's capacity CTP. This means that an item's ATP is lowered by any component CTP reservations made for that item by higher-level items in the <Link href="/baanerp/ti/glossary/glossary#BillOfMateri.ti" role="glossary">bill of material (BOM)</Link>.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Order promising</SectionTitle>
			<Paragraph>The cumulative ATP is a convenient tool for order promising. When it comes to accepting customer orders, a plan period's <Link href="/baanerp/cp/glossary/glossary#000040" role="glossary">cumulative ATP</Link> is a clear indicator of the order quantity that you can still promise to deliver in that plan period. Usually, when reference is made to checking an item's ATP (in a general sense), what is actually checked is not the ATP as you can find it in the <GUIRef href="/baanerp/cp/rmp/cprmp2101m000" role="session">Item Master Plan (cprmp2101m000)</GUIRef> session, but rather the cumulative ATP.</Paragraph>
			<Paragraph>The functionality behind the notion of cumulative ATP is further enhanced by extended <Link href="/baanerp/cp/glossary/glossary#000029" role="glossary">capable-to-promise (CTP)</Link> checking techniques. These techniques do not only consider what can be promised based on the planned supply, but also explore the possibility of producing more than the current supply planning indicates.</Paragraph>
		</GeneralSection>
		<GeneralSection><SectionTitle>Channels</SectionTitle>
			<Paragraph>In the <GUIRef href="/baanerp/cp/dsp/cpdsp5130m000" role="session">Channel Master Plan (cpdsp5130m000)</GUIRef> session, <Link href="/baanerp/cp/glossary/glossary#000037" role="glossary">channel ATP</Link> is used. Channel ATP does not depend on item availability, like item ATP, but is derived from the <Link href="/baanerp/cp/glossary/glossary#000025" role="glossary">allowed demand</Link> for the channel in question.</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/000311" role="manual">Item ATP</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000139" role="manual">To compute the projected inventory</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000117" role="manual">Component CTP reservations</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000125" role="manual">Channel ATP</Link>
		</RelTopic>
		<RelTopic><Link href="/baanerp/cp/onlinemanual/000332" role="manual">To compute cumulative ATP</Link>
		</RelTopic>
	</RelatedTopics>
</ManualTopic>
