However, this approach would become untenable as the number of stores with different systems increased or as systems changed at individual stores over time.
(this approach; would become; untenable; T:as the number of stores with different systems increased or as systems) (the number of stores with different systems; increased; ) (systems; changed; L:at individual stores; T:over time)
this approach the number of stores with different systems systems
would become increased changed
untenable T:as the number of stores with different systems increased or as systems
L:at individual stores T:over time