A technique that is used to validate the set of use cases against identified classes is called __________ technique

Which of the following is true of marketing using a direct marketing channel system?

A) Direct mail and catalog sales are more labor-intensive than telemarketing, but are more efficient at customer interaction. B) Using direct salespeople is generally cheaper than using brokers, sales agents, or manufacturer's representatives. C) Telemarketing provides a better opportunity for a sales communication but is more labor intensive and usually more expensive than direct marketing. D) Compared to indirect marketing channel systems, direct marketing channel systems maximize the number of customers that a business can profitably reach. E) Digital marketing channels have a greater customer reach than other channels, but are also more expensive.

A writer estimates it will take three months to generate spiffy documents to accompany a seminal work in operations management. He grossly underestimates the time required and misses his deadline by two months. This estimate was:

A) Objective and accurate. B) Subjective and accurate. C) Objective and inaccurate. D) Subjective and inaccurate.