Other explain please:
I change them when I get bored of seeing them in the same outfit day in day out, and I will change the whole family, but I won't always change every outfit if they haven't worn it much or ever. And occasionally I'll make them change their own clothes from everyday to party whilst just wandering about the house because they look nice. And they generally have a different hairstyle for each outfit, although swimming is always hair up on long-haired sims and sleep is always hair down. Then if I get a different hairdo with a change of outfit too