“…Parnell (2005) Measured by competitive speed and competitive variety variables Developed and applied by Roca-Puig et al (2005), later also used Escrig-Tena et al (2011) Reactive and proactive strategic flexibility according to five strategic imperatives: resources allocation needs, the need to modify business partnerships, emerging market opportunities, changing environmental conditions and changing organizational technology needs Celuch et al (2007); Celuch and Murphy (2010) Measured by six items: flexibility in relation to opportunistic shifts in economic conditions, the emergence of an unexpected market opportunity, the emergence of a new technology that adversely affects the existing business, opportunistic shifts in customer needs and preferences, the market entry of new competition and adverse changes in government regulations Developed and applied by Zahra et al (2008), later also used by Guo and Cao (2014) Measured via market flexibility, new product flexibility, expansion flexibility, manufacturing flexibility and supply chain flexibility Singh et al (2013b) Strategic flexibility is measured according to its facilitators: development of core competencies, product development, improved customer focus, fostering innovation, stronger networking, improving risk management and promoting sustainable development Dwyer et al (2014) Change of strategies according to the market entry of new competitors, changes in government regulations, shifts in customer needs and preferences, modifications in supplier strategies, the emergence of an unexpected opportunity, the emergence of an unexpected threat, political developments that affect the industry and shifts in stakeholder demands Perez-Valls et al (2015), adapted from Barringer and Bluedorn (1999) Strategic flexibility is measured via strategic planning, using a three-item scale; the items are the evaluation and review of strategic plans; adjustments of strategic plans to changing environments; and strategic planning as continuous process Ouakouak and Ammar (2015), adapting the measures of strategic planning from Segars et al (1998) and Papke-Shields et al (2006)…”