Controls should be incorporated into system specifications in the design phase of the system development life cycle (SDLC), because this is the phase where the system requirements are translated into detailed specifications and architectures that define how the system will be built and operated. Incorporating controls in the design phase ensures that the system is secure, reliable, and compliant from the start, and reduces the cost and complexity of implementing controls later in the SDLC. The other options are not the correct answers, because they are not the phases where controls are incorporated into system specifications. The implementation phase is the phase where the system is installed, configured, and tested. The development phase is the phase where the system is coded, integrated, and tested. The feasibility phase is the phase where the system concept and scope are defined and evaluated. References = CRISC: Certified in Risk & Information Systems Control Sample Questions