Calculate CCR ratio with balanced clustering

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Respected Members . Anyone know how to Vary CCR ratio (communication to computation Ratio) of workflows used in workflowsim (sphit,ligo,cybershake, and montage) in order to test some parameters like execution time or VMs utilization?
like the one`s used to generate the results in the this paper."Workflow-and-Platform Aware task clustering for scientific workflow execution in Cloud environment"
https://www.sciencedirect.com/science/article/pii/S0167739X16301182

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Anyone help please ?
I need to know how to vary CCR ratio and where to implement it ? Is there any example in workflowsim explaining this issue ?