Cooperative strategies for the availability service of repairable aircraft components

Testing an AHP model for aircraft spare parts

“…The relevant identified criteria are i) 'operational criticality' which consist of spare part essentiality and aircraft criticality, ii) 'technical characteristics' which consists of unscheduled demand, reliability issues, regional climate, scheduled demand, and scrap rate, and iii) 'supply characteristics' which consists of lead time, aircraft route, number of suppliers, specificity, and capability of repair. It is noteworthy to emphasise that in the aviation industry, both 'operational criticality' and 'technical characteristics' are suggested to be the most important criteria due to the stringent regulation imposed to ensure passenger safety (Vieira and Loures, 2016), while 'supply characteristics' is considered to be less important and moderated by the collaborative strategies among the aviation partners, which lead to an incresed certainty in the supply continuity (Kilpi et al, 2009). The developed AHP model enabled a practical and relevant multi-criteria classification of aircraft spare part thanks to its ability to i) aggregate both qualitative and quantitative criteria (Stoll et al, 2015), ii) structure and cluster all factors in hierarchical manner (Saaty, 2008;Saaty, 1990), iii) enable different weight in each criterion to be considered, iv) provide a transparent (Molenaers et al, 2012) and user friendly decisionmaking framework (Roda et al, 2014) and v) integrate the decision diagram logic to solve the specific aircraft spare part essentiality classification.…”

“…The 'supply characteristics' are considered the least important criteria compared to 'operational criticality' and 'technical characteristics', which is similar to Cakir and Canbolat's (2008) criteria weighting. This is because there have been several cooperative strategies among aviation players (Kilpi et al, 2009), which provides more certainty in supply continuity. However, some supply problems still arise because of long repair Turn…”

Aircraft fault forecasting at maintenance service on the basis of historic data and aircraft parameters

“…It can include short preflight checking or longer detailed checks of the aircraft and its component parts. Unplanned maintenance downtime causes flight service disruption, resulting in the loss of customer satisfaction for on-time performance [21]. Some component parts have a limited life, and when they expire, they should be replaced by new ones.…”

An inventory pooling model for spare units of critical systems that serve multi-companies

“…The sensitivity analyses performed via mathematical expressions and simulation indicated that the inventory holding costs impact remarkably on this decision in terms of the degree of inventory centralization. Kilpi et al (2009) specified cooperative strategies for the availability service of repairable aircraft systems and found out which factors contribute to the emergence of a particular cooperative strategy.…”