There is also anecdotal evidence of the 5-tier model being used as the basis for KPIs, which creates some tensions, as this is not the purpose of the 5-tier model.
Mae tystiolaeth anecdotaidd hefyd o’r model 5 haen yn cael ei defnyddio fel sail ar gyfer dangosyddion perfformiad allweddol, sy’n creu rhai tensiynau, gan nad dyma ddiben y model 5 haen.