Include a open ended holiday / leave option
Include a feature which works exactly the same as sickness but allows for other types of 'events'. For e.g. some of my company's staff regularly go 'offshore' but we don't know how long for when they leave. Having a rolling feature like sickness which can be open ended would be so powerful for this as we wouldn't have to backload or guess a return date. We could just let it tick over and then stop it when they return. This could be handy not just for well site but other leave such as open ended family leave (when a staff member has to take days off due to family problems but doesn't know when he/she will return). The well site leave doesn't count as sickness or holiday but does effect the alteration to the base leave amount for the staff member as he / she accrues additional leave whilst offshore.
