See Fair Work Act 2009 s.389(1)(a)
A job involves 'a collection of functions, duties and responsibilities entrusted, as part of the scheme of the employer's organisation, to a particular employee'.
Where there has been a reorganisation or redistribution of duties, the question is whether the employee has 'any duties left to discharge'. If there is no longer any function or duty to be performed by that person, his or her position becomes redundant.
An employee may still be genuinely made redundant when there are aspects of the employee's duties still being performed by other employees.
The test is whether the previous job has survived the restructure or downsizing, rather than a question as to whether the duties have survived in some form.
It should be noted that it is the employee's 'job' that is no longer required to be performed, rather than the employee's 'duties'.
The Fair Work Act does not define the term 'operational requirements'. It is a broad term that permits consideration of many matters including:
Some examples of changes in operational requirements are:
The onus is on the employer to prove that, on the balance of probabilities, the redundancy was due to changes in operational requirements.
 Jones v Department of Energy and Minerals  IRCA 292 (16 June 1995), [(1995) 60 IR 304 at p. 308 (Ryan J)]; cited in Ulan Coal Mines Limited v Howarth and others  FWAFB 3488 (Boulton J, Drake SDP, McKenna C, 10 May 2010) at para. 17, [(2010) 196 IR 32].
 Kekeris v A. Hartrodt Australia Pty Ltd T/A a.hartrodt  FWA 674 (Hamberger SDP, 19 February 2010) at para. 27.
 Suridge v Boral Window Systems Pty Ltd T/A Dowell Windows  FWA 3126 (Hampton C, 6 July 2012) at paras 73‒75.
 Ulan Coal Mines Limited v Howarth and others  FWAFB 3488 (Boulton J, Drake SDP, McKenna C, 10 May 2010) at para. 17, [(2010) 196 IR 32].
 Explanatory Memorandum to Fair Work Bill 2008 at para. 1548; see for example Mackay Taxi Holdings Ltd T/A Mackay Whitsunday Taxis v Wilson  FWCFB 1043 (Richards SDP, Spencer C, Simpson C, 12 February 2014) at para. 43, [(2014) 240 IR 409].