Because applicabilities can leave facilities unable to attain higher Levels of Achievement (See question on what being non-applicable means) for reasons other than performance it is not appropriate to use Level of Achievement to compare facilities without first confirming that their possible Level of Achievements are the same. Aggregation of Level of Achievement is also ill-advised without first confirming that all grouped facilities have the same Level of Achievement ceiling for the same reason. Therefore, using section and survey scores is preferred for naive comparative and aggregated analyses.
In practice, large groups of facilities performing the same processes regularly have the same applicabilities and, in that case, may be meaningfully compared and aggregated along the Level of Achievement. Determining whether the extra effort and fragility are worth it depends on the individual goals and context of the analysis.
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