Grand designs did not start with a grand idea. Evolution is always a big factor in achieving the great fate brought about by a successful project. As one of my mentors said to me before
My design is already obsolete by the time it is finished.
In the process of detail design implementation, many factors evolve such as new technologies, new ideas, unforeseen site conditions, or economic meltdown as what is happening now. As engineers and designers, we do have much influence on these factors, and we could not get away from their effects either. Therefore, we need to consider them as challenges in our project and take the opportunities to make them beneficial on our projects. In the process, we will be facing constraints which we must be able to identify and turn them into innovations.
Challenges, opportunities, constraints and innovations are the basic four words we must not take with complacency in project implementation.