What does it mean?
The defects liability period is a contract-defined period associated with identifying and addressing defects after completion. Some contracts use different terminology. Its duration, start event and consequences are determined by the agreement, and it should not be treated as the sole limit of every possible obligation. Keep contractual administration separate from a simple allowance for remedial work.
In practice
A project record can list an agreed completion date and the relevant defects period from the contract. The administrator uses that record to manage inspections and notices rather than relying on a calculator default.
Keep in mind
For a project record, note the document reference, revision and agreed measurement or contractual basis beside the quantity. Keep assumed information visibly separate from confirmed information. If two parties use different definitions or inclusions, resolve that difference before comparing amounts. These explanations are general estimating context; the wording of the applicable contract and its administration process must be checked for the particular job.