“…It enables companies to be responsive to uncertainty in the amount of customer demand and preferences and to adjust volume and mix of output to meet market demand (D'souza & Williams, 2000;Gerwin, 1993). Such a capability requires the ability to introduce new or customized products (Abdallah & Matsui, 2009), provide a variety of products (Tsinopoulos & Al-Zu'bi, 2014), flexibility to change initially planned delivery dates (Abdallah et al, 2009), the ability to modify product mix effectively , and the rapidity with which companies respond to signals of environment (Zaheer & Zaheer, 1997). Heizer et al (2013) pointed to flexibility performance as the ability to develop products on time, deliver products fast, have reliable scheduling, and flexible performance.…”