Marketing Performance Systems : I have learned through the years that measuring marketing performance is critical to the existence of any business...A marketing performance system will allow the business to gauge it performance in real time throughout the year.  From a long term standpoint, the measurement can measure the life cycle of products offered by the company."  Please discuss some marketing focused examples of what might be tracked and why, such as lead generation activities.  Consider the product you are marketing, what are some key areas through its PLC you suggest be tracked and why?  What are the pros and challenges with integrating a marketing performance system with sales, customer service and product development?  Further thoughts please.