Calculating quantities (costing and ordering)
| Site: | Wintec Learning |
| Course: | NZ Cert. Carpentry Level 4 - Learning |
| Book: | Calculating quantities (costing and ordering) |
| Printed by: | Guest user |
| Date: | Wednesday, 10 June 2026, 11:30 AM |
Description
IN DEVELOPMENT
The content for costings and ordering is still under development. Please see your ITAB coordinator if you need anything related to costings and ordering.
What is estimation in construction?
What is estimating and why is it important?
Before you start a job, you must have a clear and accurate understanding of:
- how much it will cost
- how long it will take
Every job is different - site conditions, building design, labour, etc., so each job needs an individual estimation. Underestimating or overestimating can have serious downsides.
Over the years, the building industry has developed ways to go about making estimates.
Introduction to estimating
Watch this video on an introduction to estimating. It is long, so you may want to break it up your viewing:
James Lee. (2016, December 19). Introduction to estimating '17 [Video file].
Retrieved from https://www.youtube.com/watch?v=7NdMVIeY-T0
Methods and processes
Watch this lecture on the methods and processes used for estimating quantities for costing and ordering.