Quote by Alistair MacLeod: “Measure twice; cut once.”
Measure twice and cut once: the carpenter’s rule still applies
Enter your email address to subscribe to this blog and receive notifications of new posts by email. Sign me up! Most of us have heard the expression measure twice, cut once and although it makes sense in a literal sense, in a figurative sense it also makes sense. In other words, think before you act. The book itself, however, is a little less clear.
Marketing Letters. Finding no statistically significant differences between the correlations obtained with the single and multiple items, the authors conclude that there is no loss in predictive validity with the use of single items, which is the basis for their recommendation. Obviously, their recommendation produces substantial savings in data-gathering costs. Consequently, their article has been highly cited over cites as of September , by authors justifying their use of single-item measures. In this note, I revisit well-known concepts of psychometric theory to demonstrate that this practice is ill-advised. First, I argue that repeated measures are necessary not only to improve the validity of some measurement instruments but also, more importantly, to make it possible to assess and correct measurement instruments for random non-systematic measurement errors.
Measure Twice, Cut Once
Russian proverb, originally referring to carpentry and needlework, meaning that care taken in preparation will prevent errors; cf. Measure twice, Access to the complete content on Oxford Reference requires a subscription or purchase. Public users are able to search the site and view the abstracts and keywords for each book and chapter without a subscription. Please subscribe or login to access full text content.
One of the more difficult tasks our clients encounter is how to accurately measure the impact of a change in their business. Change is hard, measuring and quantifying the full impact of those changes can be even more challenging. The first quarter is a great time for businesses to start making changes. They have set their goals for the year and they are all gung ho to put them in motion. We currently have a number of clients who are doing some combination of adding new locations, adding management and entry level employees, or restructuring their current teams. In addition, most of them have process initiatives they are working on to improve work flow and efficiencies.