Final answer:
The correct measurement research method to document customer opinions about performance standards is customer satisfaction surveys, which allow individuals to express personal ideas and provide businesses with insights on public opinion.
Step-by-step explanation:
Measuring Customers' Opinions on Performance Standards
The measurement research method designed to document customers' opinions on whether performance met the established standards is c) Customer satisfaction surveys. This method involves collecting data from subjects who respond to a series of questions about behaviors and opinions, potentially in the form of a questionnaire. Customer satisfaction surveys often utilize a Likert scale to assess responses which can range from 'Very Satisfied' to 'Very Dissatisfied.' Surveys are a staple in scientific research, particularly for measuring public opinion and job satisfaction.
Surveys have been refined over time to increase precision through careful sampling and improved survey techniques. They can capture nuanced feelings and insights from the population, making them an effective tool for businesses to assess if they are meeting their performance standards as perceived by their customers. The anonymity provided by standard survey formats can encourage candid responses, contributing to the reliability and validity of the collected data.