Strategy Implementation and Evaluation, management homework help

Strategy implementation and evaluation are important aspects of the strategic management process.  Consider an industry rooted in innovation (such as the cell phone industry) and the top competing companies that use an innovation leadership strategy.  How do you suppose such companies (like Apple and Samsung) manage the implementation of continuous innovation?  Discuss implementation barriers that companies considered to be leaders of innovation face (or have faced).  Provide some evidence to support your arguments.