Resources min and max

[itlchriss]

In the Rules document, I found the statement : "In "Resources", "min" and "max" are ordered lists of length T". Can we consider an intervention starting at different time with resources will have different max and min stated in the list?

[klorel]

Hi! Sorry I'm not sure I understand the question. There is Min and Max values for each ressources and each time. Interventions require ressource worload load, but they don't have min/max on ressources. Could you clarify your question ? Thank you in advance Manuel

[itlchriss]

Hello Manuel, such as in A_07.json, we have Ressources_9 with min and max, both have length of T. As I notice, the last six values in max are different with others in the max of Ressources_9. My question is, are we using different min and max as constraint with reference to the intervention starting time? Such as, if an intervention uses Ressources_9 with starting time is 1, we use min = 0 and max = 1.0. If another intervention uses the same resource with starting time is 12, we use min = 0 and max = 1.7?

Thanks and Best Regards Chriss

[itlchriss]

Hello Manuel, please let me add another question here about the resources and interventions. Imagine there is an instance with T = 10, I1 and I2 has delta of 5 and both uses 2 units of R1 at T = 2. R1 has a declaration of max = { 2: { 2: 5 }, 3: { 3: 5}} If we have scheduled both I1 and I2 with T = 2. Then we want to schedule I3 which uses also 2 units of R1 at T = 3. In this case, as I1 and I2 still move on when T = 3, do we have to account the consumption of I1 and I2 in scheduling I3? aka, is the resource still occupied within the time phrase of starting time + delta ?

Thanks and Best Regards Chriss

[klorel]

The starting time is only used to have to ressource consumption of an intervention at a time t (depending on when the intervention started).

With that, you are able to compute the ressource used at each time t by the sum over intervention worload (which again, depends on the starting time). The min/max to apply is then the one related to t.

Hope this help Manuel

[klorel]

Hi Chriss, Our posts crossed each other. A comment: the declaration of max is strange, there should be only one value for each time.

Please refer to the section 3.3 of the challenge rules document, there is a small example illustrating the time discretization. The ressource should not be taken into account for time step starting time + delta.

Hope this help Manuel