Defining a variable

[Chamari]

Hi, I need to define a variable (the use rate). I assumed the use rate slowly increases to a peak and then gradually decreases. How can I define this type of variable in a stock-flow diagram?

Please help me

[Administrator]

Can you explain what you are trying to do?

You can create something that increases (maybe using the RAMP function), but without more information about what you are trying to achieve, we cannot suggest the correct thing.

[tomfid]

You could also use a lookup - then you could just draw the shape you want.