OT: Spolehlivost PC HW - pro zajimavost

[Tomáš Hamouz]

mcc> Nahodou jsem narazil v nejakem PDFku ze stranek intelu -
mcc> Technical reference k mainboardu D845BG/PT - na nasledujici text:

mcc> 2.13 Reliability
mcc> The Mean Time Between Failures (MTBF) prediction is
mcc> calculated using component and
mcc> subassembly random failure rates. The calculation is based
mcc> on the Bellcore Reliability Prediction
mcc> Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF
mcc> prediction is used to estimate
mcc> repair rates and spare parts requirements.
mcc> The MTBF data is calculated from predicted data at 55 şC.
mcc> The MTBF calculations for the boards
mcc> are as follows:
mcc> • D845BG board MTBF: 140818.2951 hours
mcc> • D845PT board MTBF: 143991.3836 hours

mcc> MTFB je cesky zrejme "stredni doba mezi poruchami". Pokud
mcc> si hodiny prepocitam na roky, vychazi mi 16 let. Cucaj si ty
mcc> cisla z prstu? To fak zivostnost mainboardu je celych 16 let? Tak
mcc> dlouho snad nevydrzi ani kondiky ve zdroji pro CPU... (no mozna
mcc> vydrzi, ale budou mit mensi kapacitu / vetsi svod a CPU se bude
mcc> napriklad kousat...).

Pocita se ze spolehlivosti udavane vyrobcem soucastek.

Mala perlicka - kdysi jeden znamy pocital MTBF pro VKV TCVR tuzemske
vyroby, zadani bylo pouzit pouze soucastky z RVHP. Vyslo mu 3.5h

Tomas