Concept design The Window of Opportunity Window of opportunity Quality determined 100 costs committed 75 50 25 Design flexibility 哥 ource Russell B Ford and 人 16881 Lifecycle phase 2 Philip barkanConcept Design: The Window of Opportunity Quality determined & costs committed Design flexibility Window of opportunity 100 Percentage of total Problem 75 50 25 Manufacture Use definition Concept Detail design designSource: Russell B. Ford and 16.881 Lifecycle phase Philip Barkan