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Minizinc Hosptial Schedule

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I am trying to write hospital schedule for my wife. This is often referred to as a “nurse scheduling problem”. The constraint program needs to be written in minizinc. I started with the model, but my underlying solvers (Geocode, Chuffed, OR) cannot handle my code (too complex and / or too poorly written).

The aim is to develop a working minizinc model which will be hosted on a website at a later stage.

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Requirements:

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• Parameters

o All data/parameters will be stored in a separate data file

 amount of days (e.g. 90), people (e.g. Chris), shifts (e.g. evening)

 shifts require working hours

 people have contractual working time / hours

 people may have overtime from previous schedule

 hard constraint & soft constraint data

• Hard constraints

o shifts defined per day (e.g. every Monday two evening shifts)

o shifts defined per specific day (e.g. Tuesday the 30th four evening shifts)

o shifts defined per day per person (e.g. Chris every Monday two day shifts)

o shifts defined per specific day per person (e.g. Chris on Friday the 31st is off)

o within 5 consecutive days at least 1 day is off

o sum of working hours per schedule <= contractual working time + overtime

o Total amount of night shifts equally distributed

o Total amount of weekend shifts equally distributed

o Shifts depending on other shifts during per day (e.g. if there is a morning shift on Sunday, there needs to be an evening shift)

o Shifts depending on other shifts on previous days (e.g. if Chris had a nightshift yesterday, today he may only either be off or have another nightshift)

• Soft constraints

o Each shift per day has a “penalty” (e.g. Monday evening shift = 10, Monday day = 0)

o Sum of penalty to be as equal as possible within all people

o If specific shifts are scheduled on specific days (e.g. every Tuesday, every second Saturday, the 30th of Ocotober), there is a specific “benefit” allocated (e.g. 20)

• Solve

o Utility = sum of benefit – sum of penalty

o Solve maximize utility

• Output

o Schedule (days horizontal, people vertical)

o Time accounting

 How many hours available per contract per person

 How many hours worked per person

 How many shifts worked on which days per person

o Shift accounting:

 How many shifts scheduled?

 How many shifts scheduled per day?

Evner: Software Udvikling

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Om arbejdsgiveren:
( 0 bedømmelser ) Netherlands

Projekt ID: #15630046

1 freelancer byder i gennemsnit €350 på dette job

A2Design

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