Many overachieving Starbucks partners measure their comparable job performance. They do it in the same way businesses and financial analysts look at year-over-year comparable sales growth (comp sales) to gauge the vitality of a business and evaluate its future growth prospects.

By comparing their current job performance in relation to their job performance of the previous year, these overachieving Starbucks partners are able to better evaluate their contribution in the workplace to determine if their overall performance is trending positively or negatively.