在生產(chǎn)設(shè)計過程中。為賦予產(chǎn)品可靠性而進(jìn)行的工作稱為可靠性設(shè)計。在整個設(shè)計過程中，把可靠性問題考慮進(jìn)去，比產(chǎn)品投入生產(chǎn)以后發(fā)現(xiàn)不可靠因素進(jìn)行改進(jìn)要好的多。因?yàn)楹笳咄诟淖児A模具、材料、工藝等方面付出很大的代價。
可靠性設(shè)計的主要內(nèi)容包括制訂可靠性指標(biāo)，可靠性預(yù)測，可靠性分配以及與提高可靠性有關(guān)的具體設(shè)計工作和可靠性審查。
對可靠性特征量的要求稱為可靠性指標(biāo)。制訂可靠性指標(biāo)的工作包括確定指標(biāo)項(xiàng)目和指標(biāo)數(shù)值。一種產(chǎn)品的可靠性要求常常需要用幾項(xiàng)指標(biāo)來反映。指數(shù)分布失效的可靠性指標(biāo)可用失效率或MTBF來表示；對于早期失效和耗損失效宜用可靠度和可靠壽命來表示；對于控制裝置等可修復(fù)產(chǎn)品常用的還有有效度，即產(chǎn)品能工作的時間與能工作時間加不能工作時間之和的比值來表示。同一產(chǎn)品的可靠性特征量因條件、時間、功能而不同，因此在規(guī)定可靠性指標(biāo)時必須明確是對應(yīng)于什么條件、時間、功能的指標(biāo)。例如對于接觸可靠性指標(biāo)必須規(guī)定負(fù)載電壓、電流；規(guī)定偶然故障失效率必須同時規(guī)定偶然失效期延續(xù)時間即有效壽命。
Opto 22 SNAP-PS5-24DC Logic Power Supply
OPTO 22 SNAP 1/0 IDC5 4 CHANNEL DC INPUT
OPTO 22 SNAP-AIVRMS SNAP 2-Ch 0-250 V RMS AC/DC Analog Input Module
OPTO 22 SNAP I/O SNAP IDC5 4-Channel DC Input Module
OPTO 22 SNAP-PS5-24DC POWER SUPPLY
NEW OPTO 22 SNAP I/O 4 CHANNEL DC OUTPUT SNAP-ODC5SRC
OPTO 22 SNAP-ODC5SNK 4 CHANNEL DC OUTPUT MODULE
OPTO 22 SNAP-IDC5D 4 CHANNEL DC INPUT MODULE
OPTO 22 SNAP I/O Part No. SNAP IDC5 4 Channel DC Input
NEW OPTO 22 SNAP I/O SNAP-IDC5 4 CHANNEL DC INPUT 10-32VDC 5VDC LOGIG
OPTO 22 SNAP I/O SNAP IDC5 4-Channel DC Input Module
Opto 22 SNAP-0DC5SRC Solid State Relay I/O Module ! NEW !
From Canada
Opto 22 SNAP-PS5-24DC Logic Power Supply
OPTO 22 SNAP I/O Part No. SNAP IDC5 4 Channel DC Input
NEW OPTO 22 SNAP I/O 4 CHANNEL DC OUTPUT SNAP-ODC5SRC
Opto 22 SNAP I/O SNAP-ODC5SRC 4 Channel DC Output
OPTO 22 SNAP-AIVRMS SNAP 2-Ch 0-250 V RMS AC/DC Analog Input Module
Opto 22 SNAP I/O SNAP-IDC5FM 4 Channel DC Input
OPTO 22 SNAP I/O 4-CHANNEL DC OUTPUT MODULE SNAP-ODC5SRC *NEW*
NEW OPTO 22 Snap I/O SNAP-IDC5D 4 Channel DC Input
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