Can five sectors share one parameter sheet in case selection by industry?

Answer: The headers, not the values; each column is filled per sector.

Why is the medical rating lower than the defence rating?

Answer: Medical faces a pressure wash, where IP66 is enough; defence faces immersion and rain.

Should stacking tiers match the warehouse as it stands?

Answer: Add two tiers of margin in case selection by industry; a store stacking 6 may stack 8 after a pallet change.

Is routine wiping enough as a cleaning specification?

Answer: No. Without concentration, dwell time and cycle count, no finish can be chosen.

Why standardise the marking position across sectors?

Answer: Scan speed; one label position keeps the scanner in one posture.

Case Selection by Industry: Five Sectors Compared

Quick answer: Case selection by industry means the same six parameters taking different values: ingress from IP65 to IP67, working temperature from 10 to 35 degrees to -40 to 65, stacking from 3 to 8 tiers. A matrix makes the gaps visible.

The Six-Column Matrix
Ratings and Temperature: Why the Ends Differ
Drop and Stacking: Cycles and Tiers
Cleaning and Marking: Two Overlooked Columns
Why the Gaps Exist, and Four Mismatches
FAQ

1. The Six-Column Matrix

Case selection by industry reads six columns: ingress, working temperature, drop height and cycles, stacking, cleaning, marking. No sector is strictest everywhere. Medical asks only for IP66, a tier below defence, yet needs a surface that survives 5000 ppm hypochlorite; defence reaches -40 degrees Celsius but cleans with ethanol and a brush.

Case selection by industry means accepting that offset: the strictest column everywhere costs too much, the loosest fails acceptance.

Sector	Ingress	Working temp	Drop	Stacking	Cleaning	Marking
Broadcast gear	IP65	-10 to 45 °C	1.2 m, 12 cycles	4 tiers	Neutral detergent	Asset label
Third-party testing	IP67	5 to 40 °C	0.9 m, 8 cycles	6 tiers	70% isopropanol	Serial and calibration label
Defence supply	IP67	-40 to 65 °C	1.5 m, 10 cycles	8 tiers	Ethanol and brush	Laser and batch code
Medical equipment	IP66	10 to 35 °C	1.0 m, 6 cycles	3 tiers	5000 ppm hypochlorite	Sterilisation batch
Emergency stock	IP67	-25 to 55 °C	1.2 m, 10 cycles	5 tiers	Water rinse	Reflective label, expiry

2. Ratings and Temperature: Why the Ends Differ

The rating gap comes from exposure, not structure. Testing needs 30 minutes at one metre because a sample case can enter the water in transit. Medical takes IP66 because the case stays indoors and fears a pressure wash, not immersion.

Temperature spreads wider: defence needs -40 to 65 for kit parked outdoors overnight, medical 10 to 35 because equipment inside has left its range, emergency stock -25 to 55 for five years unheated.

Case selection by industry follows the material: ABS turns brittle near -20, PP holds to -30, below that an impact modifier is needed; neoprene hardens at -25 where silicone stays elastic.

3. Drop and Stacking: Cycles and Tiers

Drop differs in cycles as much as height: broadcast is hand-carried and released at waist height, testing rides trolleys and lifts, defence moves through docks and field transfer.

Item	Broadcast	Testing	Defence	Medical	Emergency
Drop height	1.2 m	0.9 m	1.5 m	1.0 m	1.2 m
Drop cycles	12	8	10	6	10
Stacking tiers	4	6	8	3	5
Stacking duration	24 h	48 h	72 h	24 h	72 h

Stacking comes from the warehouse: defence 8 tiers on pallets, medical 3, testing 6. Case selection by industry judges it by deflection: after 72 hours at 8 tiers, height loss stays under 3 mm, yet a case surviving a 1.5 m drop sinks 5 mm by day three.

4. Cleaning and Marking: Two Overlooked Columns

In case selection by industry, cleaning decides the surface finish and is most often left blank. Medical wipes with 5000 ppm hypochlorite, which attacks screen print and metal, so the shell needs a chemical-resistant finish and a 316 hinge pin. Testing uses 70 percent isopropanol, milder but still unkind to ink.

Marking is the other column: defence wants laser and a batch code, testing a serial and calibration label, emergency stock a reflective label and expiry. Each changes holes and finish.

Case selection by industry hides both until service; a wrong finish means a repaint, a wrong position a second hole.

5. Why the Gaps Exist, and Four Mismatches

Three variables drive the six columns: exposure, storage duration, handling frequency, ordered differently.

The usual mistake is borrowing a strength from one sector to cover a weakness in another: a defence case in a medical store keeps dirt in its texture, a broadcast case used for testing has nowhere for a calibration label, a testing case in an emergency store pools water after a hose-down, and an emergency case pushed to 8 tiers folds at the lid ribs.

The first two are rework, the last two failures, and all four happen because purchasing compares appearance and price instead of walking the six columns.

Conclusion

Six columns in one matrix make five sectors comparable cell by cell: two rating tiers apart, 75 degrees of temperature spread, five tiers of stacking. None is better or worse, only matched. Case selection by industry works when each column keeps its own value.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.