Consider the following statements: 1.Building Information Modeling has the ability to produce 3D CAD model. 2.Sequencing of the construction operations can be studied and the schedule can be incorporated into the BIM model. 3.BIM has the capability of adding what some refer to as the fifth dimension, the verbal definition of installed items. Which of the above statements are correct?
- A2 and 3 only
- B1 and 2 only
- C1, 2 and 3Correct
- D1 and 3 only
Solution
Concept
BIM is a 3D digital model of a building. It can add more dimensions: time (4D), and further data about installed items and cost (5D).
Step-by-step solution
1. Statement 1: BIM can produce a 3D CAD model of the building. This is correct. 2. Statement 2: The construction schedule can be linked to the BIM model to study the sequence of work (4D BIM). This is correct. 3. Statement 3: Some authors describe a fifth dimension as the verbal (written) definition or specification of installed items. This wording comes from a standard construction planning textbook, so it is taken as correct. 4. All three statements are correct, so the answer is C.
Explanation
BIM makes a 3D model and can also hold the schedule, which gives 4D planning. It can also store written data about the items installed, which some authors call the fifth dimension. So statements 1, 2 and 3 are all correct.
Why the other options are wrong
A, B and D each leave out one correct statement, so they are incomplete.
Shortcut
BIM dimensions: 3D = model, 4D = time/schedule, 5D = extra data or cost. All three statements describe real BIM uses.
Common mistake
Rejecting statement 3 because most sources call 5D 'cost'.
Correct answer: C) 1, 2 and 3