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<ManualTopic ID="/baanerp/cp/onlinemanual/000134" xml:lang="en">
   <Header>
      <Title>To generate critical capacity requirements</Title>
      <Keyword type="header" order="d1e193377">
         <Level1>Critical capacity requirements</Level1>
      </Keyword>
      <Keyword type="header" order="d1e193380">
         <Level1>Rough capacity requirements</Level1>
      </Keyword>
   </Header>
   <GeneralSection>
      <Paragraph>When a <Link href="/baanerp/cp/glossary/glossary#000018" role="glossary">production plan</Link> is generated, the critical resource
      capacity needed to carry out this production plan is recorded in the form of <Link href="/baanerp/cp/glossary/glossary#000097" role="glossary">critical capacity requirements</Link>. In the the <GUIRef href="/baanerp/cp/rmp/cprmp3501m000" role="session">Resource Master Plan (cprmp3501m000)</GUIRef> session, these requirements are displayed in the <GUIRef href="/baanerp/cp/rao/cprao2201s000#t260.cacr" role="manual">Cap. Used for Crit. Cap. Requirements</GUIRef> field.</Paragraph>
      <List>
         <ListIntro>Resource capacity is considered as critical capacity for the
        production of an item if the following conditions are met:</ListIntro>
         <ListItem>The resource appears as
        a critical <Link href="/baanerp/ti/glossary/glossary#000000000000036" role="glossary">work center</Link> in the item's <Link href="/baanerp/ti/glossary/glossary#BillOfCritic_ti" role="glossary">bill of critical capacities (BCC)</Link> (see the <GUIRef href="/baanerp/cp/rpd/cprpd3130m000" role="session">Bill of Critical Capacities (cprpd3130m000)</GUIRef> session).</ListItem>
         <ListItem>The first date with
        capacity of the plan period in which the planned supply falls (or, if there is
        no such date, the first day of the plan period) has to fall between the
        effective date and the expiry date recorded for the critical capacity in the
        item's BCC.</ListItem>
      </List>
      <Paragraph>As a rule, critical
      capacity requirements are generated when you update an item master plan (see <Link href="/baanerp/cp/onlinemanual/000086" role="manual">To maintain an item master plan</Link>). When you
      use the <GUIRef href="/baanerp/cp/rpd/cprpd4200m000" role="session">Initialize, Roll, and Update Scenario (cprpd4200m000)</GUIRef> session, however, you can
      disable the generation of requirements.</Paragraph>
      <Paragraph>When a critical capacity
      requirement is planned, the duration of the production process is an important
      factor. Starting from the assumption that the supply of the end item is evenly
      distributed over a plan period, the capacity requirement is shifted back in the
      past using the <Link href="/baanerp/ti/glossary/glossary#LeadTimeOffs_ti" role="glossary">lead-time offset</Link> and the lead time recorded
      in the BCC of the end item.</Paragraph>
      <Paragraph>The start date for the
      critical capacity requirement is computed as the start date of the plan period
      minus the lead-time offset (in working days). The end date of the requirement
      is computed as follows:</Paragraph>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Plan period end date - lead-time offset + lead time</Paragraph>
      </Formula>
      <Paragraph>The lead-time offset and
      the lead time are expressed in working days. The period comprised by the start
      date and the end date of the capacity requirement can overlap with more than
      one plan period. In that case, the required capacity is distributed over these
      plan periods in proportion to the available capacity (according to the resource
      calendar) in each plan period. For each combination of originating plan period
      and required plan period, a separate critical capacity requirement is recorded.</Paragraph>
      <Paragraph>You can view the
      critical capacity requirements and their origin in the <GUIRef href="/baanerp/cp/rmp/cprmp3560m000" role="session">Critical Capacity Requirements (cprmp3560m000)</GUIRef> session.</Paragraph>
   </GeneralSection>
   <RelatedTopics>
      <SectionTitle>Related topics</SectionTitle>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000327" role="manual">To generate critical requirements</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000086" role="manual">To maintain an item master plan</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000135" role="manual">To generate critical material requirements</Link>
      </RelTopic>
   </RelatedTopics>
</ManualTopic>