I want to build a ui dynamically based on a work flow.

For e.g,
Flow 1 has 3 stages and so the ui will have 3 widgets to capture the respective details. There would also be dependent stages so that a particular stage can’t be accessed till the previous stage is done with.
But another user could define the process in 4 steps.

Required features,
Definition of stages in the workflow, dependencies, and list of information to be captured in every stage. This should be accomplished using a gui based flow builder that uses Jason in the background.

Once this flow is defined, the corresponding ui should be created based on the flow along with backend dB and action buttons.

I know this sounds like a cms to a large extent. But I couldn’t find definition of workflows in any cms. Also it lacks flexibility of dB.

Kindly suggest how to go about build this? Is there a suitable framework available? I would prefer an opensource solution but am also open to paid solutions.

Thanks in advance,
Subbu