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You are heading the testing effort for a system that manages the air/fuel ratio of...

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You are heading the testing effort for a system that manages the air/fuel ratio of direct-injection fuel devices built specifically for high-altitude rescue helicopter engines. At altitude, the system must be able to perform in order to make enough air/fuel ratio adjustments per millisecond between fuel and both an on-board source and available ambient air in order to prevent an engine stall due to oxygen starvation. The system is following a sequential development lifecycle.

For this safety-critical software, when is the appropriate point in the lifecycle to identify and define the performance goals?

A.

After test readiness has been achieved, but before system testing starts

B.

During the requirements phase when the business stakeholders have the opportunity to agree

C.

At the very beginning of the project during the concept stage

D.

During the software design phase when the requirements are set and the design is being defined

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