There are books, articles and philosophies devoted to process improvement. Pick one. However, if you are sincerely searching for a workable approach The Purpose Driven Process Improvement Guidebook may have what you're seeking. I was impressed with the approach and found the PowerPoint presentation on purpose-driven process improvement to be a quick-start introduction. Another excellent view of process improvement is the 5-step approach by the same authors who created the Purpose Driven Process Improvement Guidebook. Highly recommended.