Final answer:
A Standard Operating Procedure (SOP) is the management tool that codifies best practice by outlining staff responsibilities, distinct from a Code of Ethics, Quality Assurance Plan, or Organizational Charter.
Step-by-step explanation:
A management tool that helps to codify best practice in a setting by laying out staff responsibilities would best be called a Standard Operating Procedure (SOP). SOPs are essential documents that describe the regular recurring activities appropriate to quality operations. They are a set of step-by-step instructions compiled by an organization to assist workers in carrying out routine operations. SOPs aim to achieve efficiency, quality output, and uniformity of performance while reducing miscommunication and failure to comply with industry regulations. This term is distinct from a Code of Ethics, which is a guide of principles designed to help professionals conduct business honestly and with integrity, or a Quality Assurance Plan, which is a plan that outlines the process of guaranteeing that the product or service meets certain quality requirements. An Organizational Charter differs as well as it often includes the organizational purpose, governance structure, and other high-level policies.