Technical Booklet B Materials and Workmanship·Page 16·2.20
Past Experience of Workmanship
Past performance of workmanship in existing buildings in use may demonstrate that a method of workmanship is capable of performing its intended function.
Past experience of workmanship, such as in a building in use, may show that the method of workmanship is capable of performing the function for which it is intended.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet B - Materials and Workmanship.pdf