VMODEL
MODEL BUILDING BLOCKS

Causes
These relators help you show what is causing the change in the model target. All causes show how the things in your model affect parameters. They let you get feedback from the coach when you're done.

These relationships affect parameters.

DIRECT INFLUENCES: making things change. These arrows connect processes to parameters. They show how the processes directly increase or decrease them. These are the most important relationships in a Vmodel model. Unless you have an increases or a decreases link in your model, nothing happens in your model.

Increases
When a process increases an amount or level or any other parameter, use this. This is a one way relationship. More information :

Decreases
When a process decreases an amount or level or any other parameter, use this. This is a one way relationship. More information:

INDIRECT INFLUENCES: Passing on the effects of processes from parameter to parameter. These are for describing how one parameter changes when another one does. They don't change things by themselves. You need a process and an increases or decreases before anything can change in your model.

Influences
When one parameter goes up or down the other does too. This is a one way relationship. More information :

Opposite-influences
When one parameter goes up or down the other does the opposite. This is a one way relationship. More information :

Sometimes, in systems, more than one thing affects something, so more than one "causes" arrow can go to a single parameter, as long as they're the same kind. In other words, any parameter can have more than one direct influence from different processes come to it. Or a parameter can have more than influence arrow coming to it. But, it can't have a direct and an indirect one at the same time. If you have two arrows that change it in opposite directions (like an increases or a decreases) the coach might ask you to say which is stronger so it can figure out whether your model matches your predictions

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