๐—ฃ๐—ฟ๐—ถ๐—บ๐—ฎ๐˜ƒ๐—ฒ๐—ฟ๐—ฎ ๐—ฃ๐Ÿฒ ๐—ฑ๐—ฎ๐˜๐—ฒ ๐—ฐ๐—ผ๐—ป๐˜€๐˜๐—ฟ๐—ฎ๐—ถ๐—ป๐˜๐˜€

๐—ฃ๐—ฟ๐—ถ๐—บ๐—ฎ๐˜ƒ๐—ฒ๐—ฟ๐—ฎ ๐—ฃ๐Ÿฒ ๐—ฑ๐—ฎ๐˜๐—ฒ ๐—ฐ๐—ผ๐—ป๐˜€๐˜๐—ฟ๐—ฎ๐—ถ๐—ป๐˜๐˜€
๐—ฃ๐—ฟ๐—ถ๐—บ๐—ฎ๐˜ƒ๐—ฒ๐—ฟ๐—ฎ ๐—ฃ๐Ÿฒ ๐—ฑ๐—ฎ๐˜๐—ฒ ๐—ฐ๐—ผ๐—ป๐˜€๐˜๐—ฟ๐—ฎ๐—ถ๐—ป๐˜๐˜€

๐—ฃ๐—ฟ๐—ถ๐—บ๐—ฎ๐˜ƒ๐—ฒ๐—ฟ๐—ฎ ๐—ฃ๐Ÿฒ, ๐—ฑ๐—ฎ๐˜๐—ฒ ๐—ฐ๐—ผ๐—ป๐˜€๐˜๐—ฟ๐—ฎ๐—ถ๐—ป๐˜๐˜€ are used to specify when an activity should start or finish.
They help control the scheduling of activities by imposing restrictions based on specific dates.

Here are the main ๐—ฑ๐—ฎ๐˜๐—ฒ ๐—ฐ๐—ผ๐—ป๐˜€๐˜๐—ฟ๐—ฎ๐—ถ๐—ป๐˜๐˜€ ๐—ฎ๐˜ƒ๐—ฎ๐—ถ๐—น๐—ฎ๐—ฏ๐—น๐—ฒ ๐—ถ๐—ป ๐—ฃ๐—ฟ๐—ถ๐—บ๐—ฎ๐˜ƒ๐—ฒ๐—ฟ๐—ฎ ๐—ฃ๐Ÿฒ:

๐Ÿญ. ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜ ๐—ข๐—ป (๐—ฆ):
Activities with a Start On constraint must start on a specific date specified by the user. This constraint locks the start date of the activity to the specified date.

๐Ÿฎ. ๐—™๐—ถ๐—ป๐—ถ๐˜€๐—ต ๐—ข๐—ป (๐—™):
Activities with a Finish On constraint must finish on a specific date specified by the user. This constraint locks the finish date of the activity to the specified date.

๐Ÿฏ. ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜ ๐—ข๐—ป ๐—ผ๐—ฟ ๐—”๐—ณ๐˜๐—ฒ๐—ฟ (๐—ฆ๐—”):
Activities with a Start On or After constraint must start on or after a specific date specified by the user. This constraint allows the activity to start later than the specified date but not earlier.

๐Ÿฐ. ๐—™๐—ถ๐—ป๐—ถ๐˜€๐—ต ๐—ข๐—ป ๐—ผ๐—ฟ ๐—•๐—ฒ๐—ณ๐—ผ๐—ฟ๐—ฒ (๐—™๐—•):
Activities with a Finish On or Before constraint must finish on or before a specific date specified by the user. This constraint allows the activity to finish earlier than the specified date but not later.

๐Ÿฑ. ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜ ๐—ข๐—ป ๐—ผ๐—ฟ ๐—•๐—ฒ๐—ณ๐—ผ๐—ฟ๐—ฒ (๐—ฆ๐—•):
Activities with a Start On or Before constraint must start on or before a specific date specified by the user. This constraint allows the activity to start earlier than the specified date but not later.

๐Ÿฒ. ๐—™๐—ถ๐—ป๐—ถ๐˜€๐—ต ๐—ข๐—ป ๐—ผ๐—ฟ ๐—”๐—ณ๐˜๐—ฒ๐—ฟ (๐—™๐—”):
Activities with a Finish On or After constraint must finish on or after a specific date specified by the user. This constraint allows the activity to finish later than the specified date but not earlier.

๐Ÿณ. ๐— ๐˜‚๐˜€๐˜ ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜ ๐—ข๐—ป (๐— ๐—ฆ):
Activities with a Must Start On constraint must start on a specific date specified by the user. If the activity cannot start on the specified date due to dependencies or resource constraints, the activity will be delayed until it can start.

๐Ÿด. ๐— ๐˜‚๐˜€๐˜ ๐—™๐—ถ๐—ป๐—ถ๐˜€๐—ต ๐—ข๐—ป (๐— ๐—™):
Activities with a Must Finish On constraint must finish on a specific date specified by the user. If the activity cannot finish on the specified date due to dependencies or resource constraints, the activity will be delayed until it can finish.

These date constraints help project managers control the ๐˜€๐—ฐ๐—ต๐—ฒ๐—ฑ๐˜‚๐—น๐—ถ๐—ป๐—ด ๐—ผ๐—ณ ๐—ฎ๐—ฐ๐˜๐—ถ๐˜ƒ๐—ถ๐˜๐—ถ๐—ฒ๐˜€ and ensure that they ๐—ฎ๐—น๐—ถ๐—ด๐—ป with project requirements and constraints.
However, itโ€™s important to use date constraints judiciously and consider their impact on the overall project schedule. ๐—ข๐˜ƒ๐—ฒ๐—ฟ๐˜‚๐˜€๐—ฒ ๐—ผ๐—ณ ๐—ฐ๐—ผ๐—ป๐˜€๐˜๐—ฟ๐—ฎ๐—ถ๐—ป๐˜๐˜€ can lead to ๐—ถ๐—ป๐—ณ๐—น๐—ฒ๐˜…๐—ถ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜† and ๐—ถ๐—ป๐—ฎ๐—ฐ๐—ฐ๐˜‚๐—ฟ๐—ฎ๐—ฐ๐—ถ๐—ฒ๐˜€ in the schedule.

By Md Abu Zaed Khan

Hello, this is Engr. Zaed Khan Planning Engineer, Associate member of Society of Engineers UAE. Expert in construction project planning, FIDIC red book, computation of extension of time claim, Contract agreement and contractual letters.

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