A kitchen renovation is not one long job; it is twelve stages, several of which cannot begin until the stage before them is physically finished and measured. Durations move with scope, supply and what demolition uncovers. The order does not. Read the sequence first, then you can see exactly where a late decision or a back-ordered appliance pushes everything behind it.
Stages one to five are planning and selection, and they happen while you still have a working kitchen. Stages six to twelve are the build, and that is the only part of the sequence your household actually lives through.
Four dependencies carry almost all of the risk in a kitchen programme. Each one is a hard gate: the stage behind it cannot be brought forward by goodwill, only by making the decision earlier.
The gate that sits earlier than most people expect is the appliance schedule. Model numbers have to be confirmed before cabinetry is cut, because every cut-out, filler panel and clearance is drawn from them. Confirmed late, it is the cabinetry that waits, not the appliance.
Delays rarely come from the trades on site. They come from information arriving later than the stage that needed it.
Stage durations are quoted against a confirmed scope and current supply, so no fixed timeframe is guaranteed in advance of design and selection.