Well a Decision Table is a rule and as such, the history record of said rule should show you all previous versions. Just click on the pencil icon to display the previous version you need and check differences.
That's true but what I need is an ability to report on the changes. We need to know when a parameter (input or output) was changed and what was that change. Based on this info, there has to be an analysis of cases which used this changed parameter value.
I need to track the change in the inputs as well as output of the decision table. Say I have a table (on n rows) with properties x and y as input.
and there is row like x=A && y=B returns C. I would like to know if any of A,B and C changes (for any of the n rows in that table). This would give me a starting point to analyse my cases which followed this changed decision table.
Well i am not really sure i never worked on such requirement but i think we can trace the Pega activity which is saving the changes in History table and if it is not a Final activity we can possibly modify it as per our requirements.