Furthermore, inspection activities are also critical for guaranteeing the safety of workers as outlined by a recent alert launched by the Western Australia Government's department of Commerce (DoC, 2013). If a standardized pallet system is working, these activities are developed according to predefined procedures and common standard quality requirements are verified. As an example, defect detection systems usually applied could vary from optical, acoustic/ultrasonic, microwave as well as X-ray, or dielectric scanning systems (Kabir et al., 2003; Patricio and Maravall, 2007);