International Journal of Applied Sciences and Smart Technologies
Vol. 8 No. 1 (2026): Volume 08, Issue 1, June 2026

Using the Six Sigma DMAIC Approach to Improve Maintenance Practices of Ground-Service Mechanical Equipment within a Sub-Saharan African Airport

Olanrewaju Samson Omisakin (University of Lagos, Lagos)
Sunday Ayoola Oke (University of Lagos, Lagos, Nigeria)
Adeyinka Oluwo (University of Lagos, Lagos)
John Rajan (School of Mechanical Engineering, Vellore Institute of Technology, Chennai, India)
Swaminathan Jose (School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India)



Article Info

Publish Date
11 Jun 2026

Abstract

Despite its ambitions for the most effective and world-class standard attainment, the ground-service equipment literature for airports is limited in engagements with the question of how to ascertain the effectiveness of maintenance services for critical ground-service equipment, to improve company goodwill and passenger comfort. By borrowing ideas from the process improvement literature, the DMAIC approach was instituted in a sub-Saharan African airport to capture the five critical ground-services mechanical equipment of package air-conditioner, escalator, travelator, baggage handling equipment and elevator. The methodology deployed to solve the problem is technical action research conducted in a large international airport. The DMAIC improvement framework was designed, installed and regularly managed for outcomes in discussions with the maintenance ground-service team from the delegated department. The cause and effect analysis was deployed to establish the frontline reasons for the equipment failures. The results revealed that 80% of the studied ground-service equipment exhibits the Cp/Cpk values above 1.33. Consequently, the maintenance procedure adopted to maintain the equipment is capable of maintaining a large majority of the equipment studied. However, there is scope to improve the performance of the escalator, whose value of the Cp/Cpk ratio falls below the 1.33 benchmark. A DMAIC framework appropriate to analyse the maintenance efficiency of ground-service mechanical equipment in airports is contributed for the first time to the airport setting.

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Journal Info

Abbrev

ijasst

Publisher

Subject

Description

nternational Journal of Applied Sciences and Smart Technologies (IJASST) is published by Faculty of Science and Technology, Sanata Dharma University Yogyakarta-Central Java-Indonesia. IJASST is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and ...