The phrase "a specified time when" is correct and usable in written English.
It can be used to refer to a particular moment or period that has been clearly defined or identified.
Example: "The project deadline is set for a specified time when all submissions must be completed."
Alternatives: "a designated time when" or "a determined time when".
Reliability of a system is the probability that the item will perform its intended function throughout a specified time period when operated in a normal environment (Brischke and Murthy 2003; Dhillon 2006; Pecht 2009).
At any time, a GP usually has several patients due to have further tests conducted at a specified time point when the diagnosis may become more clear.
This is likely to be achieved best with an a priori outline of a personal learning plan, which can serve as a vehicle for guiding educational activities over a specified time period when the progress can be assessed and a follow up learning plan formulated.
When you start a task that has a specified time frame (like when cooking), set a timer for the upper end of the range given.
A timer option is also available, which counts down from a specified time and makes an audible sound when it is done.
In addition, What's Cooking? can be used as a shopping list to remind players what items to purchase, and it can act as a timer to count down from a specified time and make an audible sound when it is done.
A list of life change items assessed how various aspects of life changed when compared to a specified time point (e.g., 2 wks. ago or one year ago).
In other words, if parties to a swaps contract -- a type of derivative that involves regular payments over a specified time period -- do not trade via a clearinghouse when they're supposed to, there's no penalty, the group argues.
I eat when I'm hungry, not at a specified time, but I do set the table first and eat a home-cooked, healthy meal.
