Free capacity, commissioning, and spare-parts diagnostics for 50–500 rack facilities. Runs entirely in your browser.
Drive, optic, cable, blanking panel, breaker — anything that was working before someone put hands on it. Counting near-misses that got caught.
Enter your facility numbers. Results update as you type.
Green —
Total IT load = racks × avg kW per rack
Usable capacity = UPS kW × redundancy factor, where the factor is
N = 1.00, N+1 = 0.80 (assumes a typical 4+1 module arrangement, one module reserved), and
2N = 0.50 (one full path reserved). The same factor is applied to cooling capacity so a unit failure doesn't strand your heat load.
Heat load (tons) = IT kW × 3412 BTU/hr ÷ 12,000 BTU/hr·ton = IT kW × 0.2843
Power headroom = usable kW − IT load. Headroom in racks takes the lesser of power headroom and cooling headroom (converted at 3.517 kW per ton), divided by average kW per rack and rounded down — you can only add racks the tighter system supports.
Estimated PUE = 1 + cooling overhead + 0.12 fixed losses, where
cooling overhead = 0.55 − 0.01 × (setpoint °F − 65), clamped to 0.25–0.60. Warmer inlet setpoints reduce mechanical work (per ASHRAE allowable-range economics); 0.12 covers UPS conversion, distribution, and lighting losses. This is a planning estimate, not a measured PUE.
Verdict: red if IT load exceeds usable power or heat load exceeds usable cooling; amber if either is above 80% of usable; green otherwise.
Answer for your current or most recent project. Levels follow standard Cx practice: factory acceptance through integrated systems testing.
Each question scores Yes = 2, Partial = 1, No = 0.
Readiness score = (points earned ÷ maximum points) × 100, rounded to the nearest whole number across all 25 questions.
The weakest link is the level with the lowest percentage of its own maximum. Ties go to the later level, because gaps in functional and integrated testing (Levels 4–5) carry the most operational risk.
The top three gaps are the lowest-scoring individual questions — all "No" answers first, then "Partial" — prioritized from Level 5 downward for the same reason.
For each critical equipment type, enter fleet size, shelf spares, vendor response SLA, and warranty status.
| Equipment | Qty in service | Spares on shelf | Vendor SLA (hrs) | Warranty | Exposure | Est. MTTR |
|---|
No equipment type combines zero spares with an SLA over 4 hours. Shelf coverage looks sane.
Target spares = max(1, ⌈10% of fleet⌉) — a common shelf-stock rule of thumb for critical infrastructure.
Exposure score (0–100) = (1 − spares coverage) × 45 + min(SLA ÷ 48, 1) × 35 + 20 if out of warranty, where coverage = min(spares ÷ target, 1). Under 35 is low, 35–65 moderate, over 65 high.
Mean time to recovery: with at least one spare on the shelf, MTTR ≈ 2 hrs (swap and restart). With zero spares, MTTR ≈ SLA + 4 hrs install, plus 8 hrs parts sourcing if out of warranty, since the vendor no longer stocks against your contract.
An equipment type is flagged as a single point of failure when it has zero spares and a vendor SLA over 4 hours — a failure there means multi-hour exposure with nothing on the shelf to bridge it.