What document provides detailed, written instructions to achieve uniformity of performance of a specific function?

• A. Standard Operating Procedures (SOPs)
• B. Sponsor-Investigator Agreement
• C. Study Protocol
• D. Case Report Form

Answer: (A)

Standard Operating Procedures provide detailed, written instructions to ensure that a specific function is performed uniformly by all personnel. In clinical research, SOPs lay out the exact steps, responsibilities, materials, and records needed to carry out routine tasks consistently, helping to maintain quality, compliance with regulations, and auditable processes across sites and staff.

This matches the idea of having a defined, repeatable method for a function, such as how a procedure is administered, documented, or monitored. The study protocol, in contrast, describes the overall plan of the study—its objectives, design, and methods—not the step-by-step instructions for everyday tasks. The sponsor-investigator agreement outlines roles and responsibilities between sponsor and investigator. The Case Report Form is the instrument used to collect data from subjects, not a procedure manual. Thus, Standard Operating Procedures best fit the description.