A workplace investigation involves scoping allegations, gathering and testing evidence, conducting fair
interviews, analysing competing accounts, and producing a report with clear findings. The strongest
investigations are disciplined early: they control scope, preserve evidence, and set communication
boundaries before the first interview.
Start with scope – this is where most investigations fail
Scope is the backbone of an investigation. It defines what is being determined and what is out of scope.
Without disciplined scope, investigations drift into ‘everything that ever happened’, timelines blow out, and the process becomes unsafe.
A good scope statement answers: what allegations are being assessed, what standards apply (policy, code,
contract), what time period is relevant, and what the deliverable will be.
Evidence gathering – documents before interviews
Interviews are only as good as the preparation behind them. The best investigations gather key documents first so interviews can be tested against contemporaneous evidence.
That might include emails, messages, meeting notes, rosters, timesheets, access logs, CCTV requests, HR files, and prior interventions. Digital evidence should be secured early so it isn’t altered or lost.
Interviews – procedural fairness in practice
Interviews should be respectful, structured and purposeful. Procedural fairness isn’t a slogan – it’s practical discipline: clear allegations, a genuine opportunity to respond, and no ambushes.
For respondents, that typically means receiving allegations clearly (often in writing) and being asked to
respond to each allegation. For witnesses, it means being asked about what they directly observed and being reminded about confidentiality boundaries.
Analysis and findings – showing your working
After evidence is gathered, the investigator weighs it. Where accounts conflict, the reasoning must be
explicit: consistency, corroboration, plausibility in context, and contemporaneous records usually matter
most.
Findings should match the evidence. A report that repeats statements and then declares a conclusion is not analysis.
Report and handover – so the decision-maker can act
The report should allow a decision-maker to make a call confidently. It should document process, evidence considered, reasoning and findings on each allegation.
After the report, the organisation still has work to do: outcome decision-making, communications, and risk controls to prevent repeat issues.
FAQs
How long does a workplace investigation take?
It depends on scope, witness availability and complexity. Clear allegations and disciplined scope are the
biggest drivers of speed.
Can a support person attend interviews?
Often yes, depending on the process. Set expectations: support is not advocacy and should not answer
questions.
What if new allegations arise mid-investigation?
Treat them deliberately: assess seriousness, decide whether to add scope, and document the decision rather than letting scope creep happen quietly.