1 Arashimi

Total No Of Staff-Months Of The Assignment Full

Not to be pedantic, but the correct way to write the term would be person-month, or man-month. The distinction is that person/month implies units of people per month. This is inaccurate.

A person-month is a unit of work that's calculated by multiplying the number of persons by the number of months they work. So a team with three developers working on a task for two months has expended 6 person-months of labor. A person-month is equivalent to hours of labor (160 hours is a common value), but work is often expressed in person-month units because it’s easier to get a feel for how many people might be needed to finish a body of work in a fixed time, or conversely how long it might take a fixed group of people to finish a task.

However, the term man-month been broadly criticized when used as a predictive metric, most famously by The Mythical Man-Month, which makes a strong argument that man-months are not fungible in this naïve manner. That said, it’s still a useful unit of work.

In calculus terms, a person month is calculated by taking the integral of staffing as a function of time between two dates.

Allowances & Benefits home


To provide staff members with a reasonable cash amount at the beginning of an assignment or transfer to a duty station. It is the total compensation payable by the Organization towards:

1) The initial extraordinary costs incurred by the staff member and his/her family members as a result of an appointment or reassignment;

2) Any pre-departure expenses that the staff member may incur as a result of having to relocate to a new duty station.


The assignment grant is normally payable to staff in the Professional and higher categories appointed under the Staff Rules, who are authorized on travel involving relocation on initial appointment, assignment or transfer, and the period of service at the new duty station is expected to be for at least one year. It is not payable in the case of appointment or assignment to a special mission.


For both removal and non-removal cases

Headquarters duty stations (H)

Field duty stations (A-E)

Staff MemberDSA x 30 daysDSA x 30 days
Each dependent50% of DSA x 30 days50% of DSA x 30 days

Headquarters duty stations (H)

Field duty stations (A-E)

For removal casesNo lump-sum payable1 month of net remuneration
For non-removal cases1 month of net remuneration

-For assignments of 1 year or more, but less than 3 years: 1 month of net remuneration

- For assignments that are expected to be of a duration of 3 years or more: 2 months of net remuneration

- If an assignment of less than 3 years' duration is subsequently extended to 3 years or more, a second 1-month lump-sum is payable at the beginning of the third year.


  • If a change of official duty station or a new appointment involves a return to a place at which the staff member was previously stationed, the full amount of the assignment grant shall not be payable unless the staff member has been absent from that place for at least one year. In the case of a shorter absence, the amount payable shall normally be that portion of the full grant that the completed months of absence bear to one year.

  • In cases where the staff member has not completed the period of service in respect of which the assignment grant has been paid, the grant shall be adjusted proportionately and recovery made under conditions established by the Secretary-General who, in exceptional circumstances, may decide to waive recovery.

For further details on assignment grant, please refer to staff rule 7.14 and administrative instruction ST/AI/2012/1 of 27 April 2012.


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