phase out components

I would like to phase out a component in a BOM and phase in a new component. The idea is that MRP checks the inventory of the phase-out component but doesn't plan new requirements. When requirements are higher than the inventory of the 'old' component then MRP should plan an order for the 'new' component.
How can this be achieved?
I was thinking of using stocking type 'U' for the phase-out component and linking the phase-in component to it in the BOM, but MRP still plans requirements on the...

Read more