Services differ from products in $4$ key ways. One is that services can be inconsistent. A restaurant can offer steak, salad, and baked potato every day of the week, but the meal might taste different from day to day. They might have a different chef preparing the meal, the lettuce might be fresh or could be a few days old, and the potato might be baked perfectly one day but slightly hard and undercooked the next. When services are likely to vary from one time to the next, this is referred to as $q,$

$$ inseparability

heterogeneity

homogeneity

perishability

$$ intangibility