Note on History of Age Replacement Policies

Note on History of Age Replacement Policies

This paper tries to trace our research history briefly from Barlow and Proschan to attain general replacement models. We begin with a random age replacement policy that is planned at a random time Y and call it as random replacement. When the distribution of Y becomes a degenerate distribution placing unit mass at T, age replacement is formulated. We obtain the general formulas for optimum repl...

Edward W. Frees. on Construction of Sequential Age Replacement Policies via Stochastic Approximation

Stochastic approximation (SA), a stochastic analog of iterative techniques for finding the zeroes of a function (e.g., Newton-Raphson), is applied to a problem in resource allocation, the age replacement policy (ARP) problem. A stochastically failing unit is replaced at failure or at time t, whichever comes first, under an age replacement policy. When the form of the failure distribution is unk...

the effects of cognitive strategies- note making and underlining- on iranian efl learners’ reading comprehension

هدف از انجام این مطالعه ، بررسی اثرات استفاده از استراتژی های شناختی یعنی "نت برداری" و "زیر خط کردن" بر روی عملکرد درک مطلب زبان آموزان ایرانی می باشد. به این منظور، 60 زبان آموز دختر سال چهارم دبیرستان از طریق آزمون پیشرفت زبان انگلیسی (نلسون)، از یک جامعه آماری بزرگتر انتخاب شدند. سپس به صورت تصادفی به سه گروه که هر گروه شامل ?0 دانش آموز همسان بود، تقسیم شدند: دو گروه آزمایش(گروه "نت برداری...

AGE REPLACEMENT POLICY IN UNCERTAIN ENVIRONMENT

Age replacement policy is concerned with finding an optional time tominimize the cost, at which time the unit is replaced even if itdoes not fail. So far, age replacement policy involving random agehas been proposed. This paper will assume the age of the unit is anuncertain variable, and find the optimal time to replace the unit.

A note on omitting the replacement schema