@Mohamed Siddiq N could you provide more details on the use case?

On face value, you can use typical Pega approaches for this. The only difference in Constellation is you aren't configuration this in the UI, as Constellation is a stateless UI.

• Case Initialisation - Set this as soon as the case is created
  • https://docs.pega.com/bundle/platform/page/platform/case-management/ini…
• Case Management - Run Data transform: Set this during the case lifecycle, when it makes the most sense to do this.
  • https://docs.pega.com/bundle/platform/page/platform/app-dev/adding-data…
• Pre-Processing - Run this as soon as the user opens the Assignment / Task
  • https://docs.pega.com/bundle/platform/page/platform/case-management/con…
• Refresh settings in the form (flow action) - Run this in the form, as another value changes
  • https://docs.pega.com/bundle/platform/page/platform/case-management/def…
  • https://community.pega.com/conversations/user-experience/form-refresh-s…

Let us know more on your use case, might be able to point you in the right direction.