Final answer:
The two primary dimensions of quality service are friendliness and accuracy, which directly affect customer satisfaction through positive interpersonal interactions and precise service fulfillment.
Step-by-step explanation:
The two primary dimensions of quality service are often considered to be friendliness and accuracy. Friendliness pertains to the interpersonal skills and the welcoming attitude that service staff provides to customers, which creates a positive customer experience. Accuracy refers to the precise fulfillment of the service delivery, ensuring that what is promised to the customer is met without mistakes or defects. While speed, price, cleanliness, efficiency, innovation, and variety are important aspects of service quality, friendliness and accuracy are specifically highlighted as primary dimensions because they directly contribute to overall customer satisfaction and service perception.