Lokacin zane, rayuwar sabis, lokacin dawo - kuna rarrabe a fili?

Lokacin ƙira, rayuwar ƙira, da lokacin dawowa sune manufofi uku da yawa. Kodayake daidaitaccen daidaitaccen tsarin tsarin aikin injiniya
"Standars" (misalai ") Babi na 2" Ka'idoji "suna lissafin ma'anar lokacin zance da rayuwar sabis, amma menene bambanci tsakanin su, an kiyasta cewa har yanzu mutane da yawa har yanzu suna ɗan rikice.

1. Lokaci na dawowa
Kafin mu shiga cikin tattaunawar, bari mu sake nazarin "lokacin dawowa." A cikin labarin da muka gabata, sau ɗaya cikin shekaru 50 = sau ɗaya cikin shekaru 50? --As da aka ambata a hankali na hudu na hanzari na iska mai tsawaita tsari ya kamata ku sani, lokacin da aka auna a cikin fitowarsa "da kuma shekara ta biyu da ta gabata. Misali, don iska mai nauyi tare da dawowar shekaru 50, yiwuwar girman shekara ɗaya shine 2%; Don iska mai ɗaukar nauyi tare da dawo da shekaru 100, yiwuwar yiwuwar shekara ɗaya shine 1%.

Don nauyin iska wanda shekara-shekara yiwuwar yiwuwar saurin iska a cikin wani shekara shine 1-p, da kuma yiwuwar ba da wucewar iska a cikin nth. Sabili da haka, yiwuwar saurin iska a cikin N shekaru ana iya lissafta ta hanyar wannan shekarun:

Dangane da wannan tsari: don nauyin iska a lokacin dawowar 50, ana yiwuwar yiwuwar wucewa ta P = 2%, da kuma yiwuwar da ta wuce, da kuma yiwuwar da ta wuce tsakanin shekaru 50 shine:

Yawan shekaru 100 da haihuwa Yankara yana ƙaruwa zuwa:

Kuma yiwuwar mafi girman a cikin shekaru 200 zai kai:

2. Tsarin Tsara
Daga misalin da ke sama, zamu iya gano cewa don masu amfani, yana da ma'ana kawai a ambaci yiwuwar kawai da wuce daidai tsawon lokacin. Bayan haka, mutane za su mutu cikin dogon lokaci, yiwuwar wuce kayayyaki masu yawa zasu kasance kusa da 100%, kuma gine-gine za su rushe (har sai an rushe su kafin su durƙusa). Sabili da haka, don haɗa daidaitaccen ma'auni, yana da mahimmanci don saka sikelin lokacin da aka haɗa kamar yadda aka tsara lokacin don ƙimar nauyin saƙo. Duk lokacin sikelin shine "lokacin zance na".

Mataki na bakwai 3.1.3 na "lamba don Loading of Tsarin Ginin" yana ba da cikakken wannan "lokacin ƙirar ƙirar shekara ta shekaru 50 yayin tantance darajar wakilin masu canzawa." Wannan tanadi ne na tilas. Dalilin da ya sa wajibi ne shi ne cewa "Babu doka, babu wani murabba'in da'ira", babu ma'ana don yin yiwuwar wuce nauyin kaya da aminci.