The decision as to whether or not an IT development project is worth carrying out $($the $"$go$"$ or $"$no$-$go$"$ decision$)$ is provided at which phase of the systems development life cycle $($SDLC$)?$

build phase $($just after system design and before programming$)$

implementation phase $($just before installation$)$

definition phase $($just after investigation and before feasibility analysis$)$

definition phase $($just after feasibility analysis and before system analysis$)$