Calculating Shift Duration

In the context of manufacturing, calculating shift duration is crucial for effective scheduling, resource allocation, and overall operational efficiency.

---

#Key Concepts

• Node: This represents a specific workstation or area within the manufacturing process that might have its own unique shift settings.
• Value Stream: This represents the overall manufacturing process, which includes default shift settings applicable to the entire operation.

---

#Formula

$$\text{Shift Duration} = (\text{Hours per Shift} - \text{Break Time}) \times 3600$$

The shift duration is calculated using the following steps:

1. Determine Hours per Shift:

• Custom Shift Settings: If the node has custom shift settings enabled, use the number of hours specified for this particular node.
• Default Settings: If there are no custom shift settings for the node, use the default number of hours per shift provided for the entire manufacturing process.

2. Determine Break Time:

• Custom Shift Settings: If the node has custom shift settings enabled and a specific break time is provided, use this break time.
• Default Settings: If there are no custom shift settings or specific break times for the node, use the default break time provided for the entire manufacturing process.

3. Calculate Working Hours: Subtract the break time from the total hours per shift.

4. Convert to Seconds: Multiply the working hours by 3600 (the number of seconds in an hour) to get the shift duration in seconds.

---

#Example

• Node Properties:

  • Custom Shift: true
  • Hours per Shift: 8
  • Break Time: 1

• Value Stream Properties:

  • Hours per Shift: 9
  • Break Time: 0.5

In this case, since custom shift settings are enabled for the node:

1. Hours per Shift: 8
2. Break Time: 1
3. Working Hours: $8 - 1 = 7$
4. Shift Duration in Seconds: $7 \times 3600 = 25200$

The total shift duration is (25,200) seconds (7 hours).