| Assembly Line - Assignments (tiasc5510m000)This session displays
the assignments, which are also
called line balances, which are defined in Line Assembly Control (LAC).
Assignments are used to define process characteristics. Assembly Line A set of consecutive line stations in which FAS (Final Assembly
Schedule) items are manufactured. The items are manufactured by passing the
items from line station to line station and by carrying out operations at each
line station. An assembly line is subdivided into a number of line segments
separated by buffers. An assembly line can be either a main line or a supplying
line. Effective Date The first date when the assembly assignment is
valid. If two assembly assignments are valid on the same date, the Active check box shows which one is active. This check
box must be selected in LAC. Expiry Date The last date when the assembly assignment is
valid. If two assembly assignments are valid on the same date or moment, the Active check box is
selected for the one that is active. If the current field
is left blank, the assignment is always valid. Cycle Time Unit The units the cycle time is measured in
(hours, minutes or seconds). AverageCycle Time An average cycle time is a cycle time
that is valid for a whole day. A non-average cycle time is one that is used for
part of a day (a shift). You define the beginning and end of the shift with the Start Time and End Time fields, in this session. Note An average cycle
time is not a mathematical average, but is a value that you consider to be a
suitable average for the nonaverage cycle times over the course of a full
day. Two types of
assignments exist, both of which exist at the same time. The average assignment
is used for more general purposes, especially for defining the average cycle
time, whereas the nonaverage assignment has a very specific period and time
range. The average cycle time is used if the AverageCycle Time check box
in the current session is selected. Average assignments Use an average cycle
time that is based on the cycle times of the nonaverage assignments for the
day. LAC uses the average assignment in planning. Planning in LAC is based on
cycle time, calendar, and availability type. Nonaverage assignments Use time-based cycle
times that are based on the operations performed on the line. The cycle time
can vary according to the time range that is provided for the
assignment.
Nonaverage
assignments are used to define order content. For generated (nonfrozen) orders,
the order content is based on the first active, nonaverage assignment. So, if
you have for a specific day 6 assignments, only the first (earliest) is used
for the generation of the order content of all orders that are planned for that
day. For frozen orders, the order content is based on the nonaverage assignment
that is in effect at the time that the order is frozen. Nonaverage
assignments are also used to offset the lead time during sequencing. When the
order is sequenced, a lead time is calculated for every order. This lead time
is based on the cycle times, and the applicable cycle time is retrieved from
the nonaverage assignment. Example There are two
assignments linked to an assembly line. Assignment A is
effective from 0:00 through 12:00 hours and has a nonaverage cycle time of 5
minutes. Assignment B is
effective from 12:00 through 24:00 hours and has a nonaverage cycle time of 10
minutes. You can define an
average cycle time of 7.5 minutes for the day. Note You must define both
an average and a nonaverage cycle time for the entire day, including periods
during which no work is actually performed. LN takes the actual hours
for the productive working day from the calendar. Active If this check box is selected, in Line Assembly
Configuration (LAC), the assembly assignment is
currently active. You can select this
check box if you have more than one average (or nonaverage) cycle time defined
for any one period. Note In ASC, this check box is only a display check box. The
value of this check box can only be set in LAC. Start Time The time the assignment is first valid. You cannot enter a
start time and end time for an average assignment, because an average
assignment is defined for the entire day. For nonaverage
assignments, the entire day must be covered by assignments, including any times
during which no work is actually performed. The start time and end time of the
working day is determined by the calendar. End Time The time the assignment is no longer valid. You cannot enter a
start time and end time for an average assignment, because an average
assignment is defined for the entire day. For nonaverage
assignments, the entire day must be covered by assignments, including any times
during which no work is actually performed. The start time and end time of the
working day is determined by the calendar. Offset Time This lead-time offset is used to calculate the start date and
end time of an assembly order when it is generated. The lead-time offset is a
factor in determining the start date of the critical material requirement. Offset Time Unit Hours, minutes or seconds. | |