Creating Scenario matrix

[ech1982]

I'm trying to create a scenario matrix for sequences of 4 constrained outputs.
For each scenario below, I have a maximal number of laps completed by each rider (9), a minimum number completed by each rider (0.5) and the number of laps completed by each rider can vary in increments of 0.5. The total sum of laps completed must be exactly 30 for each scenario. It would be good to be able to manipulate the max and min values to be able change the scenarios.

I expect there is some what if analysis or VBA approach but I can't quite work out where to start with this one.
Any help would be appreciated.
For reference, I'm using Excel 2013 and have a reasonable working knowledge of excel and limited experience with VBA.



[TABLE="width: 332"]
<tbody>[TR]
[TD]Distance:[/TD]
[TD]30[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Max laps:[/TD]
[TD]9[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Min Laps[/TD]
[TD]0.5[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Increments:[/TD]
[TD]0.5[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Scenario[/TD]
[TD]RiderA[/TD]
[TD]RiderB[/TD]
[TD]RiderC[/TD]
[TD]RiderD[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]etc.[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

 

[oldbrewer]

could a scenario be 5.5, 8, 9, 7.5 ?