<?xml version="1.0" encoding="utf-8"?>
<ManualTopic ID="/baanerp/cp/onlinemanual/at000300" xml:lang="en">
   <Header>
      <Title>Component CTP and capacity CTP order-based CTP check</Title>
      <Keyword type="header" order="d1e171386">
         <Level1>Component CTP</Level1>
         <Level2>order-based CTP check</Level2>
      </Keyword>
      <Keyword type="header" order="d1e171391">
         <Level1>Order-based CTP check</Level1>
         <Level2>component CTP</Level2>
      </Keyword>
      <Keyword type="header" order="d1e171396">
         <Level1>Capacity CTP</Level1>
         <Level2>order-based CTP check</Level2>
      </Keyword>
      <Keyword type="header" order="d1e171401">
         <Level1>Order-based CTP check</Level1>
         <Level2>capacity CTP</Level2>
      </Keyword>
   </Header>
   <GeneralSection>
      <SectionTitle>Standard items</SectionTitle>
      <List>
         <ListIntro>To calculate the date on which items are required, ERP Enterprise retrieves the lead-time
		  offsets, as follows:</ListIntro>
         <ListItem>The bill of material defines the lead-time offset for the
		  components. In addition to this lead-time offset value, the component is also
		  offset with the inbound and outbound lead-time, the safety time, and the extra
		  lead time.</ListItem>
         <ListItem>ERP Enterprise multiplies the routing operation times and the required quantity to calculate
		  the lead-time offset for the capacity.</ListItem>
      </List>
      <Paragraph>When the required date is determined, the component CTP is
		online calculated for every bucket as indicated by means of the <GUIRef href="/baanerp/cp/rpd/cprpd0100m000#cprpd000.ctpp" role="manual">Component CTP bucket</GUIRef>.</Paragraph>
      <Paragraph>However, the capacity CTP is derived from the resource master
		plan that is based on the plan period buckets as defined in the <GUIRef href="/baanerp/cp/rpd/cprpd4120m000" role="session">Scenario - Periods (cprpd4120m000)</GUIRef> session. As a result, the lead-time offset for
		capacity results in a required date that will fall in a resource master plan
		bucket after which the available capacity of that bucket is taken.</Paragraph>
      <Paragraph>You can determine the critical materials by means of the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.cria" role="manual">Critical in CTP</GUIRef> check box in the ) <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session.</Paragraph>
      <Paragraph>In a multilevel bill of material, you can indicate that only the
		lowest level components are critical in CTP. The subassemblies do not have to
		be marked as critical.</Paragraph>
      <Paragraph>If you only mark the subassemblies to have component CTP in the
		Item-Planning session, the CTP check will not calculate their availability.
		Instead, the CTP checks only perform a lead-time offset for such items based on
		the information in the bill of material as depicted above.</Paragraph>
      <Paragraph>Next, the CTP check explodes through to the critical components
		and checks the availability of components. This enables you to check only the
		critical materials in the entire product structure.</Paragraph>
      <Paragraph>For capacities the same concept can be applied by means of the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.cria" role="manual">Critical in CTP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd2100m000" role="session">Resource (cprpd2100m000)</GUIRef> session in combination with the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.catp" role="manual">Capacity CTP</GUIRef> check box in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session. Only if a resource is defined as critical and
		the item for which the resource is used has capacity CTP marked will the
		resource’s availability be checked during CTP.</Paragraph>
      <Paragraph>This enables you to check only the critical resources in the
		entire product structure.</Paragraph>
   </GeneralSection>
   <GeneralSection>
      <SectionTitle>Generic items</SectionTitle>
      <Paragraph>In case of generic items, the correct materials and capacities
		must be checked based on the chosen options in the product variant. First, the
		user configures the product variant in, for example, the sales order. When the
		user enters the ordered quantity, the CTP for that specific configuration is
		checked.</Paragraph>
      <Paragraph>The generic bill of material is therefore matched against the
		chosen options in order to find the appropriate materials and capacities. This
		action is performed online.</Paragraph>
      <Paragraph>The generic bill of material is exploded, taking into account
		all constraints, which is precisely the same action as when the customized
		product structure is created for the generic item. However, this explosion is
		merely a simulation to find the correct CTP figures. The result of the
		explosion is not stored.</Paragraph>
      <Paragraph>The lead-time offset is determined in the same way as for
		standard items. However, instead of the bill of material lead-time offset
		(LTO), the generic bill of material LTO is used to determine the required date
		for the components. In addition to this LTO value, the component is also offset
		with the inbound and outbound lead-time, the safety time, and the extra
		lead-time.</Paragraph>
   </GeneralSection>
   <GeneralSection ID="cust">
      <SectionTitle>Customized items</SectionTitle>
      <Figure space-and-orientation="indented-estimated">
         <FigIntro>In case of customized items, the ATP and Component CTP are
		  performed first for the customized items, and then for the derived-from item,
		  as illustrated in the following figure:</FigIntro>
         <HTML:IMG xmlns:HTML="http://www.w3.org/TR/REC-html40" width="929" height="604"
                   SRC="../images/tr_graph_at_customized_items.png"
                   alt="[...]"/>
      </Figure>
      <Paragraph>The ATP of the standard-to-order items does not include the ATP
		of the related customized items. As a result, if a standard to order item A has
		a relation to five different customized items, the ATP of all these customized
		items is deducted from the ATP of item A.</Paragraph>
      <Paragraph>This reaction is logical, because when the ATP is checked for
		one of the customized items, the ATP cannot, of course, consume ATP of any of
		the other customized items. ATP can only consume its own ATP and the ATP of the
		derived-from item.</Paragraph>
      <Paragraph>The ATP of the derived-from item (A) is based on the item’s own
		transactions and on-hand stock. The item order plan for this type of item
		enables you to toggle between the item’s transactions and the transactions,
		including all customized items.</Paragraph>
      <Paragraph>Both options provide the ATP for the derived-from item that is
		checked for customized items. However, only for the <GUIRef href="/baanerp/cp/rpd/cprpd6200m000#standard.only" role="manual">Standard Items Only</GUIRef> option do the transactions match
		with the ATP quantities.</Paragraph>
      <Note>
         <SectionTitle> Note</SectionTitle>
         <Paragraph>This concept of checking ATP/CTP for customized items and the
		  derived-from item is also valid for customized items that are derived from a
		  generic item. In this case, the <Link href="/baanerp/cp/rrp/cprrp0520m000#toggle.item.overview" role="command">Toggle Item View</Link> button in the item order plan is
		  available for the generic item.</Paragraph>
      </Note>
   </GeneralSection>
</ManualTopic>