A typical event will incur penalties from several sources. A democratic approach would be to consider penalties to be proportional to the size of the class effected. Alternatively the number of people-resources attending could be the measure. This would typically give an entire tutorial group the same weighting as a single member of staff. The evaluation of a timetable is likely to be the most difficult part to standardise.
Different institutions are likely to have their own peculiar requirements.
We propose that the standard include a relatively small number of basic evaluation metrics and allow for additions. Where an attempt is made to optimise a time table using data which includes an unknown function the optimiser must choose between finding out about the unknown function and writing code to evaluate it, or simply ignoring the function and failing to optimise that feature. David Corne, Kirk Jackson, Peter Ross, Ben Paechter et al.