This Guideline explains the decision-making processes for the management of instrumented protective systems (IPS) throughout a project's life cycle. It uses IEC and ISA standards as a basis for the work processes used to achieve safe and reliable process operation. It establishes a framework for a protective management system that can be used to design and manage those specific instrumented systems. By walking the reader through a project's life cycle, engineering, maintenance, and operations disciplines can easily focus on their responsibilities and duties. Using this approach, the book is useful as a primer, guidelines reference and resource manual.