| supersession chain (SCM-APO-MD) |
A chain of products that can replace each other.
For example, product A is substituted by product B due to changes in design, form, function, or manufacturing process.
In a supersession chain there can be two possible directions of interchangeability:
Products can only be substituted in one direction; for example, product A can only be substituted by product B (A->B).
Products can be substituted in both directions; for example, Product B can be substituted by product C and vice versa (B<->C).