definitions of primitive elements

$B0J2o$K%a%C%;!$NIJL\(B
$B$rI=$7$^$9!#IJL\$O!":n6H$K$h$C$F@8@.$5$l!"$=$7$F$=$N8e!"B>$N:n6H$K(B
$B$h$C$F>CHq$5$l$^$9!#(B

4. <resource>
Element <resource> represents an item that can provide any
services such as making, moving, stocking, inspecting, and so 
forth. A resource is assigned by operations with respect to the
resource capacity.

<resource>$BMWAG$O!";q8;$rI=$7$^$9!#;q8;$H$O!"@8;:!"0\F0!"J]4I!"8!::(B
$B$=$NB>$N$5$^$6$^$J$J%5!e$G!":n6H$K$h$C$F3dEv$,9T$o$l$^$9!#(B

5. <operation>
Element <operation> represents an operation, which is an activity 
that composes a production process. An operation can produce
and consume items by executing it during a certain period of time.

<operation>$BMWAG$O!":n6H$rI=$7$^$9!#:n6H$O!"@8;:%W%m%;%9$r9=@.(B
$B$9$k$b$N$G!"$"$kI}$r$b$C$?$N;~4VCHq$7$?$j$7$^$9!#(B

6. <order>
Element <order> represents a customer order, purchase order,
and production order, all of which are created to request particular
products or services. A production order is used as a source of 
dispatching order in a plant floor.

<order>$BMWAG$O!"8\5R%*!l$N%G%#%9%Q%C%A$r9T$&$?$a$N(B
$B>pJs8;$H$J$j$^$9!#(B

7. <dispatch>*
Element <dispatch> represents a work order or a dispatch order 
that execute an operation at a certain period of time on a plant 
floor. The execution of the order makes certain relations with
particular lots and tasks.

<dispatch>$BMWAG$O!":n6H%*!l$G(B
$Bl=j$KB8:_$9$k6qBNE*$JIJL\$rI=$9%*%V%8%'%/%H$G$9!#(B
$B%m%C%H$O:n6H%*!$N:n6H%*!CHq$5$l$^$9!#(B

9. <task>
Element <task> represents an actual use of resource capacity during
particular period of time on a particular resource. A work order
requires one or several tasks for each resource assigned by the order 
to execute the corresponding operation. 

<task>$BMWAG$O!"%?%9%/$rI=$7$^$9!#$3$3$G!"%?%9%/$H$O!"FCDj$N;q8;$KBP$7$F(B
$BFCDj$N4|4V$K$D$$$F$N;HMQ$rI=$9%*%V%8%'%/%H$N$3$H$G$9!#:n6H%*!e$N;q8;$KBP$7$F!"$=$l$>$l(B
$B$N%?%9%/$rMW5a$7$^$9!#(B

10. <stone>
Element <stone> represents a particular time instance used in 
scheduling decisions. This may be used for a kind of mile stones in 
an actual schedule of plant floors, in order to synchronize with other
schedules.

<stone>$BMWAG$O!"%9%1%8%e!l$N%9%1%8%e!$N%9%1%8%e!]$O!"FHN)$7$?35G0$+$I$&$+$K$D$$$F!"$h$/$h$/9M$($k$H!"$3$l$O(B
$BIJL\$^$?$O;q8;$N>e$G5/$3$k$b$N$G$O$J$$$+$H;W$$$^$7$F!"$=$N>l9g$K$O(B
$B%H%C%W%l%Y%k$NMWAG$G$J$$$[$&$,$$$$$+$H;W$C$F$$$^$9!#(B

A1. <event>
Element <event> represents an intended change of any status of 
production items or resources. The change is made independently 
on a resource such as equipments or labors at an instant of time.

A2. <action>*
Element <action> represents an execution of an event. This element
has one time instance when it is executed.

-- 
Yasu Nissy (Yasuyuki NISHIOKA), Dr.Eng.
MIT, 41-211
77 Massachusetts Ave
Cambridge MA 02139
Phone 617-452-2982, Fax 617-253-2249
 <>