Activity J has a duration of 7 and the earliest finish time of 21. If J's latest start time is 16, this must mean that J's slack is: 4.
Duration is the length of time something, from start to finish. The length can be long, like the length of a lecture series, or short, like the length of a party. The term of the name has arrived means the time when something needs to be completed.
Duration is defined as the lifetime of something. When a movie is two hours long, this is an example of a two-hour movie length.
Duration can measure the time it takes, in years, for an investor to recoup the price of a bond from the bond's total cash flows. The time period can also measure the price sensitivity of a portfolio of bonds or fixed-income securities to changes in interest rates.
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