One Factor Tests Versus Multi-Factor Tests

Dur­ing the fourth major step of the Improve­ment Kata, the learn­ers design and run exper­i­ments to address obsta­cles to their next tar­get con­di­tion. One of the basic guide­lines for exper­i­men­ta­tion is to test only one fac­tor at a time. Learn the dif­fer­ences between one-fac­tor-at-a-time tests (OFAT), mul­ti-fac­tor or fac­to­r­i­al exper­i­ment design, the pros and cons of each, and how learn­ers can select the appro­pri­ate blend of approach­es for their challenge.