| 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. Assignments exist on two levels, and are divided in two types. The types differ in purpose, whereas the levels differ in the characteristics they define. Types The following types of assignments exist: Non-average assignments The purpose of these assignments is to define process characteristics. Nonaverage assignments are used for the following purposes: They are used to define order content. For generated (nonfrozen) orders, the order content is based on the first active, nonaverage assignment. For frozen orders, the order content is based on the nonaverage assignment that is in effect at the time that the order is frozen. They 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. Average assignments The purpose of these assignments is to define an average cycle time. LAC uses the average assignment in planning. Planning in LAC is based on cycle time, calendar, and availibility type. 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. Each day must be completely covered by both average and non-average assignments. So, make sure that for each moment of the day a non-average assignment is effective, even if no work is performed for a part of the day. Average assignments automatically apply to the whole day. ERP LN takes the hours of the working day from the calendar. Levels Assignments can exist on two levels. According to these levels, the following sorts of assignments exist: Line Station Level Assignments These assignments define process characteristics per line station. The process characteristics defined, are: Man occupation and machine occupation. Number of cycle times. Work team. Operations. Line Level Assignments These assignments exist for a complete assembly line, and define characteristics that apply to the whole line. Every line level assignments is linked to a set of line station level assignments. Therefore, if you select another line level assignment, you also automatically select another set of line station level assignments. Line level assignments have the following characteristics: Cycle time data. Cycle times are based on the operations performed on a line. The cycle time can vary according to the time range that is provided for the assignment. Offset time data. Effective date and expiry date. Start time and end time. Note Operations are not visible in the Assembly Control module. Only line level assignments can be average or non-average, because this characteristic has respect to the cycle time, and the cycle time is only defined for line level assignments, and not for line station level assignments. Assignments are date and time-sensitive, so different process charactersitics can be applied to the line over different periods and/or time ranges. In LAC, several characteristics on line station level are defined as separate assignments, such as a job assignment and an operations assignment. Related topics Assembly control overview Assembly line station utilization Assembly assignment
Fields | Description
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.
Assignment | The name of the assembly assignment.
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 | The cycle time of the assembly assignment.
Cycle Time Unit | The units the cycle time is measured in (hours, minutes or seconds).
Average Cycle 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 Average Cycle 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. ERP 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.
Commands | Description
View | Choose one of the following views to display the assignments for this assembly line: View Current Assignments View Active Assignments View All Assignments
View Current Assignments | Click to view all currently active assignments for this assembly line. On a certain date and time, only one non-average and one average assignment can be active. So, the assignments that are displayed, are all active on the current date, but have different time ranges, except for the average assignment which covers the whole day.
View Active Assignments | Click to view all active assignments for this assembly line. On a certain date and time, only one non-average and one average assignment can be active. So, the assignments that are displayed, all cover a different date/time range, although average assignments exist simultaneously with non-average assignments.
View All Assignments | Click to view all assignments, active and non-active, for this assembly line.
Line Station Assignments | Click to zoom to the Assembly Line - Assignments and Line Stations (tiasc5520m000) session, which displays the line station level assignments that are attached to the selected line level assignment. This option is not available if the selected line level assignment is an average assignment, because the average line level assignments are only used to define average cycle times, and not to define process characteristics per line station.
Print Assignments | Click to zoom to the Print Assignments (tiasc5410m000) session to print the assignments.