There are three key factors that generate demand for services: desire, affordability, and willingness to purchase. A service provider must manage demand to achieve its objectives. There are different demand situations like negative demand where people refuse an offer, no demand due to lack of awareness, latent demand for better services, and seasonal demand. Demand patterns can include irregular, falling, optimum, exceeding capacity, below optimum, and excess demand. Strategies to manage demand include shifting demand to match capacity, increasing demand through promotion and expansion, flexing capacity up or down, and implementing waiting line strategies.