A data centre decommission is not one project. It is four, running concurrently, with different trades, different regulations, different lead times and different failure modes.
Data destruction and ITAD. Rack and hardware removal. Mechanical and electrical teardown. Asset recovery.
The first two sit inside IT. There is an inventory, there are established vendors, there is a recognised standard, and the people running it have done something similar before. They tend to go well. The second two do not sit inside IT, and the pattern that follows is remarkably consistent: the mechanical and electrical side gets improvised, and the asset recovery gets underpriced.
That produces the single most expensive error in this work. The tender is priced against the list that existed, which is the IT asset register. Everything in grey space then arrives as variations, at a point in the programme with no time to tender and no leverage to negotiate.
The industry terms are useful because they describe two genuinely different projects. White space is the IT floor: servers, storage, networking, racks, cabling. Grey space is the plant that keeps the IT floor alive: UPS systems, battery strings, standby generators, switchgear, transfer switches, cooling plant, fire suppression. White space usually derives from systems that already exist. Grey space usually does not exist as an inventory anywhere until somebody walks the site and builds it.
Which matters commercially, because the power plant is routinely the largest recoverable value in the building. Generators, UPS and switchgear are also the items most often handed to the teardown contractor as part of the clearance price, precisely because they sit outside the list the project was scoped from. That is sometimes the right answer. It is only the wrong answer when nobody established what the plant was worth first.
The plan sets out five hazard gates in grey space, each of which stops work until cleared and none of which can be cleared by the IT team: electrical isolation, UPS batteries, generator fuel and oils, refrigerant recovery, and fire suppression. Batteries hold dangerous charge when a system appears dead and are hazardous waste under their own consignment rules. Refrigerant must be recovered by a certified engineer before any equipment is cut, moved or scrapped, and venting is one of the few things in a decommission that can attract personal as well as corporate consequences. This template tells you where the gates are. It does not tell you how to clear them, and nothing in it should be read as permission to proceed without a competent person.
Two sequencing rules are worth the download on their own. The utility disconnect has the longest lead time in the project, is booked with a third party you do not control, and cannot be pulled forward when things slip, so fix that date first and schedule backwards from it. And cooling comes out last, not first, because equipment still in the building needs an environment until the day it leaves. Removing cooling early because it feels like a separate job is the classic sequencing error, and it converts a controlled teardown into a race.
There is also a section on the data bearing media that never appears on an asset register: spares kits, hot spares still seated in arrays, boot media on internal ports, cache and NVRAM modules, management module storage, tape in offsite rotation, and network device configurations holding credentials, topology and security policy. Storage arrays get particular attention, because RAID sets spread data across multiple physical media and destroying some of the drives leaves recoverable fragments on the rest.
Inside the 29 pages: the four projects framing, the white and grey space inventories, the phase sequence with dependencies, where the recoverable value sits, data destruction at project level, white space teardown practicalities, the five hazard gates in detail, grey space extraction and rigging access, the closeout documentation pack, a decommissioning risk register and governance with sign-off.
Five appendices: a pre-decommission site survey covering access, hazards, hidden media and reinstatement, a RACI with one accountable party per row, a printable hazard gate register, a 24-point readiness checklist and a glossary.
The companion Excel tracker handles the inventory item by item, with dropdown validation, hazard flags that drive the gate register, estimated versus actual value, and a summary that reconciles inventory against disposition. It flags an inventory with no grey space lines, because that means half the project has not been recorded.
Free, customisable. Everything in square brackets is a field you complete.