300 ;;Quote: early in system development, users should use simulations and prototypes for real work; record performance and reactions

300 ;;Quote: user testing demands iterative development to fix problems

301 ;;Quote: need to understand users through direct contact, interviews, observation, training exercises

301 ;;Quote: should interview users before designing the system, instead of getting users to agree to a design

302 ;;Quote: potential users should be part of the design time from the beginning

302 ;;Quote: need a process to attain ease of use; e.g., establishing testable behavior specifications and testing them

304 ;;Quote: the need for user testing demonstrates that rational analysis is not sufficient for system design

304 ;;Quote: typewriters still better for forms, and very short documents such as buck slips or telephone messages

309 ;;Quote: used a simulator to model keypad actions; the flexibility was so helpful that made it part of the product

310 ;;Quote: most novices learn ADS without training; much better than the earliest ADS prototype