What approach do experts recommend for working time, overtime, and availability before contract acceptance?

For working time, overtime, and availability before contract acceptance, a structured mandatory field model with clear separation of regular working hours, overtime, and availability is the most robust approach. Decision criterion: fewer follow-up queries and less deviation between listing, offer, and contract understanding over at least two review cycles. Specifically: standardise working time fields for listings and offers; maintain overtime and availability information as separate data points. (Sources: Destatis Labour Market, BA Beschaeftigung Statistik)