Despite being knocked down, the pool industry always finds a way to get back up again. During years such as 2014, when pool permit registrations dropped after a series of growth between 2011-13, the diversity of services offered by many pool companies (e.g. maintenance, renovations, repair, etc.), along with their ability to reduce operating costs by adopting new systematic approaches to business management, project design, and construction are what keeps them profitable. It is also what keeps them optimistic for the coming season, as with changing climates—weather and economics—choosing the right forecasting technique can be tricky.