The document compares the benefits and constraints of Building Information Modeling (BIM), CAD measurement, and manual measurement across various stages of a construction project including:
1) The preparation/briefing stage where BIM allows for greater client involvement but has high costs, CAD provides accurate measurements but also has high costs, and manual measurement is cheapest.
2) The design stage where BIM improves client understanding through virtual models but requires industry buy-in, CAD speeds irregular measurements but 2D sketches still require manual work, and manual measurement has accuracy issues.
3) The pre-construction stage where BIM saves time and improves accuracy but has training/software costs, CAD ensures accuracy and data management but only