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<ManualTopic ID="/baanerp/cp/onlinemanual/000302" xml:lang="en">
   <Header>
      <Title>Plan periods in Enterprise Planning</Title>
      <Keyword type="header" order="d1e196335">
         <Level1>Plan periods</Level1>
         <Level2>Enterprise Planning</Level2>
      </Keyword>
   </Header>
   <GeneralSection>
      <Paragraph>A scenario consists of <Link href="/baanerp/cp/glossary/glossary#000109" role="glossary">plan periods</Link>. Plan periods can be of varying length, and
      are defined in calendar days, weeks, or months.</Paragraph>
      <Paragraph>You can define the plan
      periods for a scenario in the <GUIRef href="/baanerp/cp/rpd/cprpd4120m000" role="session">Scenario - Periods (cprpd4120m000)</GUIRef> session. After this, you need to run the <GUIRef href="/baanerp/cp/rpd/cprpd4200m000" role="session">Initialize, Roll, and Update Scenario (cprpd4200m000)</GUIRef> session for the changes to take
      effect.</Paragraph>
      <Note>
         <SectionTitle>Note</SectionTitle>
         <Paragraph>If the plan-period
        definition does not cover the whole scenario, LN extends the last plan
        period to cover the remainder of the scenario.</Paragraph>
      </Note>
      <Paragraph>Plan periods are used as
      time buckets for <Link href="/baanerp/cp/glossary/glossary#000059" role="glossary">master planning</Link>.</Paragraph>
      <Note>
         <SectionTitle>Note</SectionTitle>
         <Paragraph>In Enterprise Planning, horizons and time fences are rounded to the end of a plan
        period, except for the <Link href="/baanerp/cp/glossary/glossary#000071" role="glossary">signal horizon</Link>. For that
        reason, you must always define plan periods for a scenario, even if you only
        use <Link href="/baanerp/cp/glossary/glossary#000060" role="glossary">order planning</Link>.</Paragraph>
      </Note>
   </GeneralSection>
   <RelatedTopics>
      <SectionTitle>Related topics</SectionTitle>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000044" role="manual">Scenarios in Enterprise Planning</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000023" role="manual">Horizons and time fences</Link>
      </RelTopic>
   </RelatedTopics>
</ManualTopic>