T. M. Al Muhareb and J. Graham-Jones , Using Lean Six-Sigma in the Improvement of Service Quality at Aviation Industry: Case Study at the Departure Area in KKIA. journal = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology. February 2014, vol. 85(1). 145 - 151 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/9997202.