Which term refers to the initial steps required to guarantee proper operation of a water system?

The term that refers to the initial steps required to guarantee proper operation of a water system is indeed Startup Procedures. This set of actions is crucial as it establishes the functionality and effectiveness of the system from the very beginning. During the startup phase, various components are checked, adjusted, and calibrated to ensure that they all work together harmoniously and can meet the designated performance standards.

Proper startup procedures include tasks such as verifying that all connections are secure, checking for leaks, and confirming that equipment is functioning properly under expected pressure and flow conditions. These steps are essential for preventing issues down the line that could result from improper setup, which could lead to system failures or inefficiencies.

While the other options refer to important aspects of a water system's life cycle, they do not specifically encompass the initial steps for launching the system. System Maintenance pertains to the ongoing care and upkeep necessary to keep the system running efficiently, Operational Testing involves assessing the system's performance after it has been commissioned, and Quality Control Measures are related to ensuring that the water produced meets safety and quality standards throughout its operation rather than just at startup. Therefore, Startup Procedures are uniquely focused on ensuring the system is correctly prepared for operational use from the outset.