For window package with opening restrictors in Queensferry, the technical sequence begins with sill level, so we coordinate the frame base with the internal sill or window board and the external weathering detail, with sill level kept as the lead check for this restricted-opening windows scope. We then use glass specification to coordinate restrictor type, opening angle, handle operation, frame fixing and user access, and we match glazing type and pane configuration to the intended room use and project specification, with sill level kept as the lead check for this restricted-opening windows scope. Before closure, locking points is reviewed and we align sash locking points and keeps so the window closes evenly around the frame, with sill level kept as the lead check for this restricted-opening windows scope. The handover also covers internal making good; we repair or finish internal reveals, sill zones and decoration interfaces around the new frame, with sill level kept as the lead check for this restricted-opening windows scope. Together these checks support windows that retain practical ventilation while limiting the opening range.