Before revision:  Our results on effort towards quality are consistent with software evolution theory and show that focus on quality always declines over a product's life cycle. On the other hand, our findings on market share indicate that initial market conditions dictate the optimal path to pursue and affect final market share .
After revision:  Our results on effort towards quality are consistent with software evolution theory and show that focus on quality always declines over a product's life-cycle, thus showing conditions when Lehman's 7th law of software evolution holds. We also numerically illustrate control paths under different market conditions .