<?xml version="1.0" encoding="utf-8"?>
<ManualTopic ID="/baanerp/performance/cp/P000019_top-down_item_selection" xml:lang="en">
   <Header>
      <Title>Top-down item selection</Title>
      <Keyword type="header" order="d1e1087514">
         <Level1>Valid for LN FP0, FP1, FP2, FP3, FP4, FP5, FP6, 10, 10.2</Level1>
         <Level2>top-down item selection</Level2>
      </Keyword>
      <Keyword type="header" order="d1e1087519">
         <Level1>Effect on CPU</Level1>
         <Level2>top-down item selection</Level2>
      </Keyword>
      <Keyword type="header" order="d1e1087524">
         <Level1>Top-down item selection</Level1>
         <Level2>performance</Level2>
      </Keyword>
      <Keyword type="header" order="d1e1087529">
         <Level1>Performance</Level1>
         <Level2>top-down item selection</Level2>
      </Keyword>
   </Header>
   <GeneralSection>
      <Paragraph>In the <GUIRef href="/baanerp/cp/rrp/cprrp1210m000" role="session">Generate Order Planning (cprrp1210m000)</GUIRef> session, if you select the <Link href="/baanerp/cp/rrp/cprrp1210m000#f.run.top.down" role="formfield">Use Top-Down Item Selection</Link> check box, <GUIRef href="/baanerp/cp" role="package">Enterprise Planning</GUIRef> extends
		the item selection and takes into account the multi-level structure of the <Link href="/baanerp/ti/glossary/glossary#BillOfMateri_ti" role="glossary"
               Update="No">bill of material (BOM)</Link>, <Link href="/baanerp/cp/glossary/glossary#000005" role="glossary" Update="No">supplying relationships</Link>, and the relations
		between <Link href="/baanerp/ti/glossary/glossary#GeneriItem_ti" role="glossary" Update="No">generic items</Link> and the possible <Link href="/baanerp/td/glossary/glossary#ProducVarian_td" role="glossary"
               Update="No">product variants</Link>.</Paragraph>
      <List>
         <ListIntro>For the range of plan items you specified in the <GUIRef href="/baanerp/cp/rrp/cprrp1210m000#plni.f" role="manual">From Plan Item</GUIRef> and <GUIRef href="/baanerp/cp/rrp/cprrp1210m000#plni.t" role="manual">To Plan Item</GUIRef> fields, or for any item that LN includes in the
		  selected range because of the bottom-up item selection, LN extends the item
		  selection with the following:</ListIntro>
         <ListItem>Components in the bill of material.</ListItem>
         <ListItem>Supplying items you specified in the <GUIRef href="/baanerp/cp/rpd/cprpd7130m000" role="session">Supplying Relationships (cprpd7130m000)</GUIRef> session.</ListItem>
         <ListItem>Components in the generic bill of material, for the generic
		  items included in the specified item range.</ListItem>
         <ListItem>Derived-from items; the generic or normal items you use to
		  create project items in the <GUIRef href="/baanerp/ti/pcs" role="module">Project Control</GUIRef> module of <GUIRef href="/baanerp/ti" role="package">Manufacturing</GUIRef>, of any
		  project items included in the specified item range.</ListItem>
      </List>
   </GeneralSection>
   <GeneralSection>
      <Paragraph>If you perform order planning for a single plan item, the <GUIRef href="/baanerp/cp/rrp/cprrp1210m000#f.run.top.down" role="manual">Use Top-Down Item Selection</GUIRef> check box offers a useful
		option. However, if you perform order planning for <Emphasis>all</Emphasis> plan items (the full range), the setting of the <GUIRef href="/baanerp/cp/rrp/cprrp1210m000#f.run.top.down" role="manual">Use Top-Down Item Selection</GUIRef> check box makes no
		difference for the end result. In that case, selecting the <GUIRef href="/baanerp/cp/rrp/cprrp1210m000#f.run.top.down" role="manual">Use Top-Down Item Selection</GUIRef> check box only slows down
		the planning run.</Paragraph>
   </GeneralSection>
   <GeneralSection>
      <GeneralSection>
         <SectionTitle>Performance aspects</SectionTitle>
         <List>
            <ListItem>Effect on CPU: Yes</ListItem>
            <ListItem>Effect on database growth: Not applicable</ListItem>
         </List>
      </GeneralSection>
   </GeneralSection>
   <RelatedTopics>
      <SectionTitle>Related topics</SectionTitle>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000163" role="manual">RRP run, item selection</Link>
      </RelTopic>
   </RelatedTopics>
</ManualTopic>