Weekly Repair Order (RO) activity reversed the downward trend that had begun in late September and finished the year on a modest upswing. In the last week of November RO was down 10% but it bounced back sharply into the second week of December before falling back into the negative high single digits during the last two full weeks of the year.
Until recently the Automotive Aftermarket was provided data from key channel distributors indicating monthly sales activity and market share for various vehicle part categories. At the beginning of 2012 the consortium of companies that provided these data collapsed. Since then, parts suppliers and others in the Aftermarket have been searching for a new source of data to fill the void and this very issue is being discussed by industry representatives at the AAIA Fall Leadership Days conference in San Francisco.
In this post I propose a methodology for estimating market size and discuss how this estimate of total demand can form the basis for replacing, and perhaps improving upon, the market data previously provided by NPD.