Mass Change planning calendar

[Pranab]

Dear Experts,

I have a requirement for mass change and update planning calendar where we can mass change periods and fix them in mass.

I went through all related threads on forum and I am made aware that this is not possible in SAP as its a ALV grid and we cannot do any development on this screen.

My client is pressed on this requirement as there is huge vendor base and wants to mass update for better productivity.

Customer is ready to invest in any sub-module or any component that is required to enable this feature.

Please suggest any options/add-ons to support this requirement.

Thanks and regards,

Pranab