You can use a parameter to store a value that differs between deployments but is fixed for all cases of a deployed process. The value is set when you configure the process. For example, if you have a process for approving expense reports, you could define a parameter for the approver’s email address that is set at deployment. If you are using the Performance edition, the value can also be changed after deployment.
Defining a process parameter
You can define a parameter for a pool or for a lane. A parameter can be of type text, Boolean, interger, or double.
To define a parameter: