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Scheduling mode

former_member691361
Participant
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Hi Gurus,

Kindly brief on how earliest,current and specified dates come into effect at the time of scheduling modes.

Moreover explain the difference between forward with forwardreverse and backward with backwardreverse; elaborate on the impact of it at the time of scheduling.

Thanks,

Prasanth

Accepted Solutions (1)

Accepted Solutions (1)

Former Member
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Hi Prashanth,

1) Scheduling mode:-

With the scheduling mode, you define how the system schedules or reschedules operations

at the selected resources.

The system distinguishes between finite and infinite scheduling modes

Which scheduling modes are available depends on the application that you are

using.

The system only performs scheduling or rescheduling if the constraints,

such as relationships to be observed between the operations or orders are not

violated as a result.

2) Scheduling directions:-

a) Forward:- If you select this option, the system searches in the future for

a scheduling date. The system starts searching at the desired start date.

b) Forward with reverse:- If you select this option, the system first searches

in the future for a scheduling date.

If it does not find a scheduling date in this direction, it searches in the past.

c) Backwards:- If you select this option, the system searches in the past for a

scheduling date.

d) Backwards with reverse:- If you choose this option, the system searches in

the past for a scheduling date. If it does not find a scheduling date in this direction,

it searches in the future.

Regards

R. Senthil Mareeswaran.

Answers (1)

Answers (1)

Former Member
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Hi prashanth,

Earliest date with forward and working with find slot-:Then from that current system date it will search in forward direction earliest free available slot to schedule order. In case upto end of planning horizon(governed by time profile in DS board) it does not finds any free slot there will be error.

Earliest possible start date means it will search for possible slot from current system date(if no offset is defined) and not from current order date means suppose your order is on 10th dec but there is free available slot 27th nov it will reschedule order on 27th.

Basic difference here between forward and forward +reverse is planning mode forward will give error message if it couldnot find slot in planning direction while in forward +reverse it will search backwards but it will not be possible with earliest date as it cannot go back from current date.

Earliest date is even not possible with backward, backward+reverse for same logic mentioned above. It works only with forward.

Current date with forward+Reverse-: Again if you work with find slot it will search for free slot from current order start date in forward upto end of planning horizon if it wont find any slot it will search backwards upto current system date.

In case of backward+reverse it seraches for slot backwards from current end date of order upto current system date and if it doesnot find it will search in forward direction.

Specified date only desired date is manualy specified by you rest of logic remains same.

Hope this helps.

Regards,

Siddharth