Final answer:
Expert judgment is a tool used in all Project Integration Management processes. It provides invaluable insights from individuals with specialized expertise, often aiding in decision-making and identifying potential mistakes early on in a project.
Step-by-step explanation:
Expert judgment is a tool for all Project Integration Management processes. It refers to the expertise provided by any group or individual with specialized knowledge or training and is often brought into a project to provide insights or help solve complex problems. Expert judgment can influence decision-making by providing valuable insights that aren't typically quantifiable. This process can be particularly helpful as experts often have a good sense of the answer before a detailed analysis is completed. This early intuition provides a base for further examination and helps identify possible issues that may require a closer look.