This book covers the methods used to gather and cleanse Business, Technical, Functional, Non-functional and UX requirements. The different types of requirements meet the needs of the readers and the stakeholders in any organisation producing products and/or services for both internal and external use. An important part of cleansing requirements is ensuring they are beyond any doubt and this may require subject matter experts to give their input and approval. Process descriptions cover the automated and manual steps required to complete ach requirement. This also helps to give clarity to the design and may be the reason for updating the design of the product or service.