"Many of the characteristics of properly specified requirements have been well known for many years, at least among professional requirements engineers. Yet most requirements specifications seen today in industry still include many poor-quality requirements.
"Far too many requirements are ambiguous, incomplete, inconsistent, incorrect, infeasible, unusable, and/or not verifiable (e.g., not testable). To combat this sad state of affairs, this column provides a questionnaire that can be used when specifying and technically evaluating requirements."
And it's a nice refresher for more experienced project workers also.
Read Specifying Good Requirements.
Reference: Donald Firesmith: “Specifying Good Requirements”, in Journal of Object Technology, vol. 2, no. 4, July-August 2003, pp. 77-87.