Table 1.

Sequence of events to derive and validate common reference intervals (RIs) through an evidence-based approach and extensive data analysis

Identify problem

Agree to address common RIs

Identify relevant groups

Seek formal co-operation (if external bodies involved)

Form working group

Describe problem in detail

Allocate a budget and determine sources of funding

Gather information (surveys, RI studies, data mining, bias study, calibration traceability, RI verification laboratory information, flagging rates)

Consider solutions

Produce discussion paper, etc.

Seek feedback from stakeholders

Revise recommendations

Obtain formal endorsement

Publish

Promote

Monitor introduction