Sequence Dependent Setup Time
While scheduling work orders on a resource, if there is a sequence dependent setup time, then this has to be taken into account. While planning, the resource is loaded with work orders for a given bucket but they are not sequenced. In scheduling, these work orders are sequenced.
Suppose the following orders are loaded on a resource for a given bucket date
- WO1_Black, WO2_White, WO3_Yellow, WO4_White
Let the sequence dependent setup time be as given below
- Moving from Black to White and vice versa takes 30 mins.
- Moving from Black to Yellow and vice versa takes 30 mins.
- Moving from White to Yellow and vice versa takes 10 mins.
If the resource is currently running a Yellow product, then optimum sequencing would be * WO3_Yellow -> WO2_White -> WO4_White -> WO1_Black
Entering Data
Attributes
Here attributes have to be specified. Attributes could be colour, size, speed etc
| Field | Description |
|---|---|
| Attribute Name | Name of the Attribute. |
| Attribute Description | Description of the Attribute. |
| Setup Time | Setup Time in minutes needs to be applied for the attribute. |
| Attribute Order | Which attribute should be used first for sorting. It is an integer value. Typically, a higher setup time will have the lowest Attribute Order number. |
| SortASC | While sequencing, how the sort of attribute value should be. Possible values are True for ascending and False for descending. |
| SortType | Sort type could be either String, Number or Date. |
| Attribute |
|---|
| Color |
Item Attributes
Here Item is associated with attributes and a value is given to it.
| Field | Description |
|---|---|
| Item | Item for which attribute setup time is to be considered. |
| Attribute Name | Attribute name that should be used for the setup time |
| Attribute Value | Value of the attribute. |
| Item | Attribute | Value |
|---|---|---|
| Item_Y | Color | Yellow |
| Item_B | Color | Black |
| Item_W | Color | White |
Item Attributes Op Setup Time
Here a setup time in minutes for the operation associated with an item can be specific. For this right click on Item and click on option Op set up Time
| Field | Description |
|---|---|
| Item | Item for which attribute operation setup time to be considered. |
| Attribute Name | Attribute name that should be used for the operation setup time |
| Operation | Operation name for the setup time. |
| SetupTime | Setup time value in minutes |
Sequence Dependent Setup Time
Here setup time is specified for moving from one attribute value to another
| Field | Description |
|---|---|
| From Attribute | From Attribute name that should be used |
| To Attribute | To Attribute name that should be used |
| SetupTime | Setup time needs to be applied. |
| Time Uom | Uom of setup time |
| From Attribute | To Attribute | Time | Time Uom |
|---|---|---|---|
| Black | White | 30 | Minutes |
| White | Black | 30 | Minutes |
| Black | Yellow | 30 | Minutes |
| Yellow | Black | 30 | Minutes |
| White | Yellow | 10 | Minutes |
| Yellow | White | 10 | Minutes |
