A portfolio matrix creates a comparative view; it does not prove that a unit must receive funding or be sold. The meaning of each axis, the date of the measures and the limits of comparison must remain visible before an allocation is proposed.
Unit of analysis
Definition of each axis
Measurement period
Decision not automated
Make interdependencies explicit
A unit can be unattractive in isolation yet contribute a shared capability, a channel, a customer relationship or a risk concentration. Conversely, an apparent synergy remains a hypothesis until its mechanism, cost, owner and alternative are documented.
Shared capability
Revenue or cost mechanism
Dependency
Evidence still needed
Allocate conditionally and set a review rule
Weights and scores express a protocol, not objective truth. Test plausible alternatives, record the constraint that binds, and state the threshold or signal that would reopen the allocation, transformation, divestment or exit decision.