Customers contribute to service quality through their roles as promote
rs of the firm, co-producers of the firm's service and consultants to
the organization. A model of customer voluntary performance (CVP) is d
eveloped and empirically tested with a sample of grocery customers. Cu
stomer voluntary performance refers to helpful, discretionary customer
behaviors that support the ability of the firm to deliver service qua
lity Global customer satisfaction, perceived support for customers and
customer commitment are considered as antecedents of CVP. interrelati
onships among these variables are also considered. The results provide
support for eight of the twelve hypothesized relationships. Implicati
ons of the study are discussed for researchers and managers.