<?xml version="1.0" encoding="utf-8"?>
<ManualTopic ID="/baanerp/cp/onlinemanual/000055" xml:lang="en">
   <Header>
      <Title>Net-change phase number computation</Title>
      <Keyword type="header" order="d1e199370">
         <Level1>Net-change phase number computation</Level1>
      </Keyword>
      <Keyword type="header" order="d1e199373">
         <Level1>Phase numbers</Level1>
         <Level2>net-change computation</Level2>
      </Keyword>
   </Header>
   <GeneralSection>
      <Paragraph>The value of the <GUIRef href="/baanerp/cp/rpd/cprpd6200m000#runtype" role="manual">Run Type</GUIRef> field in the <GUIRef href="/baanerp/cp/rpd/cprpd6200m000" role="session">Compute Phase Numbers (cprpd6200m000)</GUIRef> session determines whether a regenerative
		computation or a net-change computation is carried out.</Paragraph>
      <Paragraph>In a regenerative
		computation, each plan item's phase number is recomputed. In a net-change
		computation, not every plan item is recomputed.</Paragraph>
      <List>
         <ListIntro>A net-change computation uses the following fields in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session:</ListIntro>
         <ListItem> 
            <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.sphc" role="manual">Master Phase Number Parent</GUIRef>
         </ListItem>
         <ListItem> 
            <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.phch" role="manual">Order Phase Number Parent</GUIRef>
         </ListItem>
      </List>
      <Paragraph>When a new BOM line, BCM
		line, or supplying relationship is generated, ERP Enterprise automatically updates
		these fields with the phase number of the plan item's parent.</Paragraph>
      <Paragraph>When you carry out a
		net-change computation, ERP Enterprise compares the plan item's current phase number
		with the parent phase numbers stored in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session. A plan item's phase number is recomputed only
		if the plan item's current phase number is less than or equal to the parent
		phase number.</Paragraph>
   </GeneralSection>
   <RelatedTopics>
      <SectionTitle>Related topics</SectionTitle>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000156" role="manual">Planning sequence and phase numbers</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000053" role="manual">To recompute phase numbers</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000155" role="manual">To compute phase numbers for master-based planning</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000054" role="manual">To compute phase numbers for order-based planning</Link>
      </RelTopic>
   </RelatedTopics>
</ManualTopic>