<?xml version="1.0" encoding="utf-8"?>
<ManualTopic ID="/baanerp/cp/onlinemanual/lt000190" xml:lang="en">
   <Header>
      <Title>Offsetting from finish date to start date</Title>
      <Keyword type="header" order="d1e174437">
         <Level1>Offsetting</Level1>
         <Level2>from finish date to start date</Level2>
      </Keyword>
      <Keyword type="header" order="d1e174442">
         <Level1>From finish date to start date</Level1>
         <Level2>offsetting</Level2>
      </Keyword>
      <Keyword type="header" order="d1e174447">
         <Level1>Enterprise Planning</Level1>
         <Level2>planning</Level2>
      </Keyword>
      <Keyword type="header" order="d1e174452">
         <Level1>Planning</Level1>
         <Level2>enterprise planning</Level2>
      </Keyword>
   </Header>
   <GeneralSection>
      <Paragraph>The second part of offsetting, offsetting from the finish date
		to the start date, depends on the order type. This part of offsetting differs
		for production orders, purchase orders, and distribution orders. The offsetting
		of the various order types is described in this section.</Paragraph>
   </GeneralSection>
   <GeneralSection>
      <SectionTitle>Production orders</SectionTitle>
      <List>
         <ListIntro>Three factors determine how a production order is
		  planned/offset:</ListIntro>
         <ListItem> 
            <Emphasis>Routing planning</Emphasis>: If the estimated start
		  date of the production order is <Emphasis>before</Emphasis> the date in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.fltm" role="manual">Start of Fixed Lead-Time Horizon (SFC)</GUIRef> field in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session, you deal with short term planning.
		  Consequently, production orders are planned in a detailed way. The production
		  order is planned with routing, routing operations and quantity. The order
		  lead-time is the sum of the operation lead-times.</ListItem>
         <ListItem> 
            <GUIRef href="" role="manual">Fixed order lead-time</GUIRef>: If the estimated start
		  date of the production order is <Emphasis>after</Emphasis> the date in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#cprpd100.fltm" role="manual">Start of Fixed Lead-Time Horizon (SFC)</GUIRef> field in the <GUIRef href="/baanerp/cp/rpd/cprpd1100m000" role="session">Items - Planning (cprpd1100m000)</GUIRef> session, you deal with long-term planning.
		  Consequently, production orders are planned in a less detailed way (to gain
		  performance). Therefore, if the estimated start date falls after the date in
		  the <GUIRef href="" role="manual">Start of Fixed Lead-time Horizon (SFC)</GUIRef> field, then details
		  are skipped. Instead, the fixed order lead-time is used to plan, without using
		  routing and operations.</ListItem>
      </List>
      <Note>
         <SectionTitle> Note</SectionTitle>
         <Paragraph>The estimated start date is determined by planning backward
		  the fixed <GUIRef href="/baanerp/cp/rpd/cprpd1100m000#tiipd.oltm" role="manual">Order Lead Time</GUIRef> that is defined in the <GUIRef href="/baanerp/ti/ipd/tiipd0101m000" role="session">Items - Production (tiipd0101m000)</GUIRef> session.</Paragraph>
      </Note>
      <List>
         <ListItem> 
            <Emphasis>Generic items</Emphasis>: Sometimes, the production
		  order involves a generic item. The generic routing has a set of possible
		  operations. The choice of operations depends on the configuration, so in a
		  planned order for a generic, not yet configured, demand all operations are
		  planned. This offsetting differs from normal items.</ListItem>
      </List>
      <List>
         <ListIntro>The following sections in this chapter discuss the following
		  three situations:</ListIntro>
         <ListItem>Routing planning</ListItem>
         <ListItem>Planning with a fixed order lead time</ListItem>
         <ListItem>Planning of generic items</ListItem>
      </List>
   </GeneralSection>
   <GeneralSection>
      <SectionTitle>Routing planning</SectionTitle>
      <Paragraph>A production order consists of a series of operations. The
		sequence of operations is managed by the routing. One item can have multiple
		routs, with various sets of operations, dependent on order
		quantity.</Paragraph>
      <Paragraph>In addition, you can model phantom items, which result in a
		network of parallel operations. The impact of phantom items on planning is
		described later in this chapter.</Paragraph>
      <List>
         <ListIntro>One planned operation contains the following lead-time
		  components:</ListIntro>
         <ListItem>
            <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#cprrp200.mvrd" role="manual">Queue (Next Operation)</GUIRef>
         </ListItem>
         <ListItem>
            <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#e.average.setup.t" role="manual">Average Setup</GUIRef>
         </ListItem>
         <ListItem>Production run time, based on cycle time</ListItem>
         <ListItem>
            <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#cprrp200.wttm" role="manual">Wait</GUIRef>
         </ListItem>
         <ListItem>
            <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#cprrp200.mvtm" role="manual">Move</GUIRef>
         </ListItem>
      </List>
      <Paragraph>Production time can be either quantity dependent or fixed, which
		is determined by the <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#cprrp200.fdur" role="manual">Fixed Duration</GUIRef> checkbox.</Paragraph>
      <List>
         <ListIntro>Two options are available:</ListIntro>
         <ListItem>Normal, no fixed duration ( <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#cprrp200.fdur" role="manual">Fixed Duration</GUIRef> checkbox is cleared)</ListItem>
      </List>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Production time = cycle time * order quantity / routing quantity</Paragraph>
      </Formula>
      <List>
         <ListItem>Fixed duration ( <GUIRef href="/baanerp/cp/rrp/cprrp2100m000#cprrp200.fdur" role="manual">Fixed Duration</GUIRef> checkbox is selected)</ListItem>
      </List>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Production time = cycle time</Paragraph>
      </Formula>
      <Paragraph>If you use the detailed routing information, the offsetting of
		two operations looks as follows:</Paragraph>
      <Figure space-and-orientation="indented-estimated">
         <HTML:IMG xmlns:HTML="http://www.w3.org/TR/REC-html40" width="980" height="220"
                   SRC="../images/tr_graph_lt_po_offset_operations.png"
                   alt="[...]"/>
         <FigCaption>Production orders, offset operations</FigCaption>
      </Figure>
   </GeneralSection>
   <GeneralSection>
      <SectionTitle>Operation overlap</SectionTitle>
      <Paragraph>The previous figure shows how you can plan two operations
		sequentially. Operation 20 starts when operation 10 is finished. If you use a
		transfer batch quantity or percentage, operation 20 can start when operation 10
		is partly finished.</Paragraph>
      <Figure space-and-orientation="indented-estimated">
         <HTML:IMG xmlns:HTML="http://www.w3.org/TR/REC-html40" width="841" height="274"
                   SRC="../images/tr_graph_lt_po_operations_overlap.png"
                   alt="[...]"/>
         <FigCaption>Production orders, operation overlap</FigCaption>
      </Figure>
   </GeneralSection>
   <GeneralSection>
      <SectionTitle>Network of phantom operations</SectionTitle>
      <Paragraph>If item A has phantom items B and C as components, the
		production order contains the operations of item A, as well as of items B and
		C. If, for example, phantom B is required on the third operation of item A, and
		C is required on the second operation, the planning looks as
		follows:</Paragraph>
      <Figure space-and-orientation="indented-estimated">
         <HTML:IMG xmlns:HTML="http://www.w3.org/TR/REC-html40" width="850" height="306"
                   SRC="../images/tr_graph_lt_po_network_of_operations.png"
                   alt="[...]"/>
         <FigCaption>Production orders, network of operations</FigCaption>
      </Figure>
   </GeneralSection>
   <GeneralSection>
      <SectionTitle>Capacity</SectionTitle>
      <Paragraph>The required capacity for a production order is derived from the
		operation lead times. Occupation factors indicate how many men or machines are
		involved in the operation. Only the setup time and the production time require
		capacity.</Paragraph>
      <List>
         <ListIntro>For the two types of production times, the capacity
		  calculations are:</ListIntro>
         <ListItem>Normal, no fixed duration:</ListItem>
      </List>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Man hours = average set up * man occupation for set up + cycle time * order quantity  * man occupation for production / routing quantity</Paragraph>
      </Formula>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Machine hours = average set up * machine occupation + cycle time * order quantity  * machine occupation / routing quantity</Paragraph>
      </Formula>
      <List>
         <ListItem>Fixed duration:</ListItem>
      </List>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Man hours = average set up * man occupation for set up + cycle time  * man occupation for production / routing quantity</Paragraph>
      </Formula>
      <Formula space-and-orientation="indented-estimated">
         <Paragraph>Machine hours = average set up * machine occupation + cycle time * machine occupation / routing quantity</Paragraph>
      </Formula>
      <Paragraph>In the <GUIRef href="/baanerp/cp" role="package">Enterprise Planning</GUIRef> resource plans, either man or machine capacity is stored
		based on the <GUIRef href="/baanerp/ti/rou/tirou0101m000#tirou001.ccap" role="manual">Critical Capacity for Planning</GUIRef> field in the <GUIRef href="/baanerp/ti/rou/tirou0101m000" role="session">Work Centers (tirou0101m000)</GUIRef> session.</Paragraph>
   </GeneralSection>
   <RelatedTopics>
      <SectionTitle>Related topics</SectionTitle>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000034" role="manual">Calendars in Enterprise Planning</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000023" role="manual">Horizons and time fences</Link>
      </RelTopic>
      <RelTopic>
         <Link href="/baanerp/cp/onlinemanual/000407" role="manual">Time Zones in Enterprise Planning</Link>
      </RelTopic>
   </RelatedTopics>
</ManualTopic>