Measuring performance in high contact services has proven difficult la
rgely due to the fact that production and sales occur simultaneously a
nd because the services provided are heterogeneous. This article shows
that the simultaneity and heterogeneity of services need not detract
from the usefulness of performance indicators. A discussion summarizin
g desirable and undesirable components of service efficiency and produ
ctivity indicators is included, and a measurement approach is proposed
. Using this new perspective on simultaneity and heterogeneity, servic
es will be able to better track and improve performance.