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Material is spent on …

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Rafael Davila
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Joined: 1 Mar 2004
Posts: 5054

Material is spent on …

Please look at the following scenario, total remaining supply is greater than total remaining consumption but it is impossible.  Dialog says material is spent on 04-02-21 but I believe it is a bit latter due to consumption on activity 2, this confuse me. For complex schedules the dialog box does not helps, unless I am missing something.

Any suggestion on how to identify the source of the problem will be welcomed.

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Best Regards, Rafael Davila

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Rafael Davila
User offline. Last seen 1 hour 57 min ago. Offline
Joined: 1 Mar 2004
Posts: 5054

But what is the date that matters?

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Materials Gantt helps keep focused.

Image-016 click on thumbnail for a better view

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In my example total supply was increased but there is an excess of 2000 units that should be solved. In this case figuring out the date is easy but what about more complex scenarios?

  • Is it good idea to display a date?

Yes,

"Material A availability is not sufficient for scheduling of remaining activities" is the right wording.

Thank you!

Rafael Davila
User offline. Last seen 1 hour 57 min ago. Offline
Joined: 1 Mar 2004
Posts: 5054

It is not that by 04-02-21 all Material B is spent, by this date no Material B is spent and all of the supply by Activity 1 (-500) is still available.

  • Perhaps it should read - On 04-02-21 Material A availability is not sufficient for scheduling of remaining activities.

I guess the solution to this issue is on the scheduler not on the software; can be solved by increasing supply before this date, can be solved by decreasing consumption after, or by a combination.

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Spider Project reports that on certain date it cannot start the next activity because available materials are not sufficient for its execution untill the end.

If consumption preceeds the supply then consumption activity cannot start and Spider Project reports that on certain date material availability is not sufficient for scheduling of remaining activities.

Bogdan Leonte
User offline. Last seen 20 weeks 1 day ago. Offline
Joined: 18 Aug 2012
Posts: 215

Rafael, Daniel

I recreated the example. It is a bit confusing I admit, but in the Reason of delay for activity 2 Spider fills in „Material "Material A" (Code: A); 0 days”.

So you could filter for this.

It would be great if in the schedule report you would get similar to resources...Activity 2 (Code:2) is delayed due to Material A (Code:A) which is spent on xx.yy.zzzz hh:mm

Maybe in the Material Gantt a vertical red line could be drawn in order to highlight material supply constraints (this is implemented in the Resource Gantt).

Best Regards,
Bogdan

daniel morais
User offline. Last seen 1 week 4 days ago. Offline
Joined: 2 May 2018
Posts: 20

I agree with Rafael, this is confuse me too. I try two variations this schedule, first makes activity 3 SS(start-start) with activity 2, but the dialog says same thing:

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first_option.png

Second Option, how activity 3 depends on from activity 2, I changed for activity 2 be supplier and activity 3 be consumer, and the dialog anymore shows. Maybe algorithym consider that the supplier must comming first than consumer? like figure bellow!

 

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income_x_expenditure.png

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second_option.png

Best Regards,

Daniel Crisóstomo

daniel morais
User offline. Last seen 1 week 4 days ago. Offline
Joined: 2 May 2018
Posts: 20

I agree with Rafael, this is confuse me too. I try two variations this schedule, first makes activity 3 SS(start-start) with activity 2, but the dialog says same thing:

 

Second Option, how activity 3 depends on from activity 2, I changed for activity 2 be supplier and activity 3 be consumer, and the dialog anymore shows. Maybe algorithym consider that the supplier must comming first than consumer? like figure bellow!

 

 

Best Regards,

Daniel Crisóstomo