University of Twente Student Theses


Determining the Required Spare Parts Inventory to Ensure Military Vehicle Availability

Gunnink, B. J. (2023) Determining the Required Spare Parts Inventory to Ensure Military Vehicle Availability.

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Abstract:The Dutch Ministry of Defence (MoD) has recently acquired 1185 Iveco Manticore vehicles, also known as the Medium Tactical Vehicle. Verebus Engineering has the task of setting requirements that ensure an availability of 350 days a year. Effectively, the MoD and Verebus are looking to establish a safety inventory for spare components that meets the availability requirements while minimising cost. The demand for spare components consists of two parts, one preventive, one corrective. As demand and supply for preventive maintenance is predictable, the focus will lie on managing uncertainty for corrective maintenance, which can be modelled as a Poisson process. Subsequently, the reordering policy can be modelled as a (s-1, s) process. This single echelon model can then be extended into a two-echelon model that also includes a depot, which allows for cost savings by pooling inventory. After performing calculations for both the single echelon and two-echelon models to the desired level of availability and comparing their performance, the two-echelon model comes forward as the best option for the MoD, as it is around 20% less expensive than the single echelon system.
Item Type:Essay (Bachelor)
Faculty:BMS: Behavioural, Management and Social Sciences
Programme:Industrial Engineering and Management BSc (56994)
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