What is Forward and Backward Scheduling?

What do you mean by forward scheduling and backward scheduling?Backward scheduling is the calculation of deadline dates: the arrival time at the customer site is calculated as the earliest possible goods receipt time at the customers unloading point on the requested delivery date. All four of the delivery and transportation scheduling lead times are subtracted from the customer’s requested delivery date to determine if this date can be met.

The transit time, loading time, and pick/pack time are subtracted from the customer’s requested delivery date to calculate the required material availability date.

The system calculates backward scheduling as follows:

Requested delivery date minus transit time  = Goods issue date
Goods issue date minus loading time = Loading date
Loading date minus transportation lead time = Transportation scheduling date
Loading date minus pick/pack time = Material availability date

By default, the system will calculate delivery dates the closest day, taking into consideration the working days of the shipping point and a rounding profile. In this case the system assumes a 24 hour work day and lead times can be entered in days up to 2 decimal points.  This is referred to as daily scheduling.

Precise scheduling calculated down to the day, hour and minute is supported.  This allows the scheduling of a delivery within a single day.  It is activated by maintaining the working hours for a particular shipping point.

Backward scheduling is always carried out first.  If the material availability date or transportation scheduling date is calculated to be in the past, the system must then use forward scheduling.

Advertisements

One thought on “What is Forward and Backward Scheduling?

  1. Ian

    Well explained. I was wondering if author could also include few real-world examples in order for readers to understand, specially for those like me who does not have any field experience at all.

    Thanks,

    Inam

    Reply

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s