What is the difference between

[Silver]

What is the difference between:
- A set of activities has a set of preferred starting times
- A set of activities has a set of preferred time slots

thanks

[Liviu Lalescu]

It is different only if activity has duration >=2.

For instance, if third period is forbidden. A1 has duration 2. Then, with preferred starting times, A1 can begin at 1 and 2, with time slots, A1 can begin at 1 only.

Time slots is more restrictive.

[Volker Dirr]

Also have a look here:
http://www.timetabling.de/manual/FET-manual.en.html#id_26

it is the first question i answered in that manual :-)

[Silver]

thnkx