Model-based assessment of military aircraft engine maintenance systems

Adamides, Emmanuel D.; Stamboulis, Yeoryios; Varelis, A G

doi:10.1057/palgrave.jors.2601756

Cited by 26 publications

(9 citation statements)

References 13 publications

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“…Each time a product failure occurs, the buyer incurs a fixed cost r ≥ 0. In commercial airline operations, r represents, among other things, the cost associated with rescheduling flights that result from delays due to an engine coming off-wing for repair (Adamides et al 2004). In addition, if the vendor does not have inventory on hand to replace the failed product, the buyer incurs a variable cost > 0 per unit time until the system function is restored.…”

Section: Cost Structurementioning

confidence: 99%

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Signaling New Product Reliability with After-Sales Service Contracts

2015

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P rior studies on performance-based contracting (PBC) for after-sales services have highlighted its advantages over traditional resource-based contracting (RBC), when products are established and their reliability is known to all parties. We develop a game theoretic model to investigate how these insights are affected when the vendor is privately informed about the reliability of a newly developed product. A novel feature of our model is the interaction between reliability signaling (private information) and the vendor's discretionary investment in spares inventory (private action), which arises naturally in the setting we consider. We find that this interaction leads to contrasting equilibrium outcomes under the two contracts: RBC induces the vendor to focus on inventory savings, leading to underinvestment in spares, whereas PBC induces the vendor to focus on reliability signaling, achieved through overinvestment in inventory. As a result, neither contract is efficient. We investigate two means to mitigate this inefficiency, but either approach has caveats: (a) making inventory verifiable removes the trade-off between reliability signaling and inventory investment, but results in diverging contract preferences between the vendor and the buyer; (b) pooling inventories across multiple buyers saves inventory costs but it also hinders reliability signaling, potentially exacerbating inefficiency.

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Section: Cost Structurementioning

confidence: 99%

“…Cost per unscheduled maintenance $800,000 Estimated based on industry expert input and consistent with figures reported in Hopper (1998). l Average repair lead time for engine overhaul 3 months Based on numbers in Adamides et al (2004) (accounting for operational improvements).…”

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confidence: 99%

Signaling New Product Reliability with After-Sales Service Contracts

2015

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“…However, these inherently dynamic uncertainties are typically not considered in the models. Some exceptions can be found in military aviation (Adamides, Stamboulis, & Varelis, 2004;Guarnieri, Johnson, & Swartz, 2005;Mattila & Virtanen, 2014;Mattila, Virtanen, & Raivio, 2008), engine maintenance (Gatland, Yang, & Buxton, 1997), and part repairs (Cobb, 1995;Kilpi, Töyli, & Vepsäläinen, 2009).…”

Section: Frontlog As Schedulingmentioning

confidence: 99%

Frontlog scheduling in aircraft line maintenance: From explorative solution design to theoretical insight into buffer management

Öhman

Hiltunen

Virtanen

et al. 2020

J of Ops Management

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Based on a multi‐year research engagement with practice, we present a novel solution design for frontlog scheduling in aircraft line maintenance and offer theoretical insights into buffer management in operations. The field problem of the case airline was to improve departure reliability for long‐haul aircraft without increasing maintenance resources, and without using backup aircraft. Frontlog scheduling is the purposeful introduction of over‐maintenance as a buffer of maintenance tasks that can be opportunistically postponed. A detailed simulation of the solution introduced in the airline's operations indicates a performance frontier shift, concurrently improving departure reliability, and reducing maintenance cost. We position the novel practice in operations and maintenance management literature, arguing that the frontlog creates a new type of time buffer, available in contexts where capacity serves predictable as well as unpredictable demand. Further theoretical elaboration leads us to reconceptualize buffer management along time and capacity dimensions, reducing inventory to a special case of time buffering.

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“…A simulation model that evaluates the effect of operating decisions on the maintenance turntimes is shown by Cobb [20]. Similarly, a simulation model has been developed by Adamides et al [21] to assess the performance of military aircraft engine maintenance system. An integrated mission-based life cycle cost modelling environment is presented by Orsagh et al [22] and Sandberg et al [23] predicted LCC using a simulation model for the conceptual design of jet engine components.…”

Section: Cost Engineeringmentioning

confidence: 99%

Life cycle cost modelling as an aircraft design support tool

Thokala

Scanlan

Chipperfield

2009

Proceedings of the Institution of Mechanical Engineers, Part G:

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This article summarizes the work that has been carried out as part of the FLAVIIR project, a 5-year research programme looking at technologies for future unmanned air vehicles (UAVs). This is a UK Engineering and Physical Sciences Research Council funded project sponsored by BAE systems. A framework to estimate the life cycle cost of UAVs is presented. The acquisition costs are estimated using a hierarchical structure and a discrete simulation model is used to estimate the maintenance and operation costs. The architecture to estimate the life cycle cost and the associated models are described. A framework is presented in which the cost models developed can be integrated into the design process to facilitate the comparison between different configurations. It is then demonstrated how this framework can be used to perform trade-off analysis and cost-based optimization.

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Model-based assessment of military aircraft engine maintenance systems

Cited by 26 publications

References 13 publications

Signaling New Product Reliability with After-Sales Service Contracts

Signaling New Product Reliability with After-Sales Service Contracts

Frontlog scheduling in aircraft line maintenance: From explorative solution design to theoretical insight into buffer management

Life cycle cost modelling as an aircraft design support tool

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