To compute supply lead-times

The order dates (start dates) and delivery dates (finish dates) for planned orders in Enterprise Planning can be determined in a number of ways.

The following factors play an important role in determining the order start and finish date:

  • Lead times defined for various parts of the supply process.
  • Calendars (which define workdays and working hours).
  • Distance between the supplying and receiving address.

For information about the way in which LN determines order start and finish date, refer to online manual topic Determining order start and finish date (basic procedure).

In general, the following applies to the start dates and finish dates of planned orders:

  • The start date and finish date are never before the scenario start date.
  • The start date can be in the past.
  • If you simulate within the time fence, the finish date can be in the past.
  • If you do not simulate within the time fence, the finish date is never before the time fence (and never in the past).
  • If you use fixed deliveries and simulate within the time fence, the finish date is always on a fixed delivery moment.
  • If you use fixed deliveries and do not simulate within the time fence, the finish date is always on a fixed delivery moment after the time fence.

Supply lead time

The effective supply lead time depends on the type of order, and the planning method used.

Production lead time

Planned production orders can be planned in two ways:

  • Based on detailed routing data, using the appropriate calendars
  • Based on a fixed lead time, using the enterprise-unit calendar

Purchase lead time

Planned purchase orders are planned using various types of lead-time data:

  • Item/supplier data (or item purchase data, if no supplier can be found)
  • Item/warehouse data
  • Distance tables

Planned purchase orders can be planned in two ways:

  • Based on various types of lead times, using the appropriate calendars.
  • Based on a calculated lead time, interpreted as calendar days.

Distribution lead time

Planned distribution orders are planned by using supplying relationships.

Planned distribution orders can be planned in two ways:

  • Based on distance tables, using an appropriate calendar.
  • Based on the fixed supply lead time defined in the Supplying Relationships (cprpd7130m000) session, using an appropriate calendar.

In general, there are two ways in which Enterprise Planning calculates order start dates and order finish dates of planned orders:

  • Based on a fixed value that the user defines, or that LN calculates.
  • Based on item-specific data about each lead-time component in the order lead time.

Which of these two methods Enterprise Planning uses, depends on the order type, and on whether the finish date that Enterprise Planning finds, is before or after the fixed lead-time horizon.

For detailed information about lead-time calculation according to order type, you can refer to the corresponding related topic.

Related topics