CPD is a by-product of what a person does naturally i.e. we learn and develop daily in some form or another. CPD is not limited to the traditional âclassroomâ or âbook learningâ activities but also the development/improvement of oneself as a person and within oneâs work environment. The CPD process is there to simply help and manage a personâs development through an ongoing basis, keeping a record, reviewing and guiding what is learned, and in turn improving plumbing as a professional industry.