During the launch phase the product team is living life in the fast lane( or in the pressure cooker). Manufacturing is doing a gradual scale-up of output . the marketing planners who got a good look at their ultimate target market as early as the opportunity are now deep into the hundreds of tactical details required for launch. The critical step(if a company takes it) is the market test, a dress rehearsal for the launch, and managers hope any problems discovered are fixable between dress rehearsal and opening night: If not, the opening has to be delayed. Given the time pressures involved, managers have come up with many new ways to. do reliable market tests puickly to com plement the familiar test market which con be inordinately time-consuming and costly .we will review many market test techniques in chapter 18