Writing a Risk Assessment for a New Manufacturing Process

Rolling out a new manufacturing process on the shop floor is never just an engineering exercise. It changes how people work, what they handle, what machines they stand near, and what can go wrong when the line starts humming. A solid risk assessment is what gives engineers, operators and managers the confidence to switch the process on, and what gives regulators and insurers proof that the duty of care has been taken seriously.

In Australia, that duty sits inside the model Work Health and Safety laws administered by Safe Work Australia and enforced by state authorities such as WorkSafe Victoria, SafeWork NSW and Workplace Health and Safety Queensland. The WHS framework expects a person conducting a business or undertaking, the PCBU, to identify hazards and control risks so far as is reasonably practicable, and to consult with workers and any health and safety representatives at every meaningful step. Standards such as AS/NZS ISO 31000 for risk management and the AS/NZS 4024 series for machinery safety sit alongside these laws and shape what a defensible assessment looks like.

The rest of this article walks through how to build a risk assessment for a new manufacturing process in a way that satisfies both the regulator and the people who will actually run the line. It covers the legal footing, how to find the hazards that matter, how to score and control them, what good documentation looks like, and when to revisit the assessment once the process is live.

Getting the Legal and Standards Foundations Right

Before a single hazard is written down, the assessment needs to be anchored in the right regulatory and standards landscape. The Work Health and Safety Act and Regulations in each state set out the primary duties of care, while Safe Work Australia publishes codes of practice that explain how those duties can be met in practical terms. For manufacturing, the most relevant codes usually cover hazardous chemicals, manual tasks, confined spaces, plant and machinery, and managing the risk of falls.

Standards developed jointly by Standards Australia and Standards New Zealand fill in the technical detail. AS/NZS ISO 31000 provides a generic risk management process that suits any organisation, while AS/NZS 4024.1 sets out the safety-of-machinery principles used when commissioning new equipment. There are also hazard-specific standards for things like electrical work, noise, and chemical exposure that may apply depending on the process. Pulling the right ones in early means the assessment can reference them directly, which makes life easier if WorkSafe ever comes knocking on the door of the shed.

It also helps to know which state regulator has jurisdiction. A new food processing line in Geelong falls under WorkSafe Victoria, a steel coil handling upgrade in Port Kembla goes to SafeWork NSW, and a remote mineral processing pilot in the Pilbara may involve both the state regulator and resources-specific codes. The PCBU has the same core obligations in each case, but the inspectorate, the consultation mechanisms and the local codes of practice can differ. Getting this mapped out at the start avoids rework later.

Walking the Floor to Find What Can Bite You

A risk assessment is only as good as the hazards it captures, and the best way to find them is to walk the proposed process with the people who will run it. Pull in the tradies, the maintenance fitters, the electricians, the production supervisor and any HSRs. Have a proper yarn with them about what they do now, what the new process will change, and what worries them. Their lived experience will surface hazards that no checklist can.

Common hazard families to consider for a new process include mechanical hazards from moving parts, entanglement points and stored energy; chemical hazards from new raw materials, weld fumes or cleaning solvents; electrical hazards from new control panels and busbars; thermal hazards from molten metal, autoclaves or heated presses; noise and vibration from new motors or presses; ergonomic hazards from awkward postures or repetitive motions; and psychosocial hazards such as fatigue, shift work and machine pacing pressures.

In Australia there are a few hazards that deserve specific attention. Heat stress is a real risk in facilities with poor ventilation through the summer months, particularly in northern and inland operations where summer temperatures regularly push past forty degrees. UV exposure affects outdoor tasks and loading bays even in winter in places like the Hunter and Illawarra. Regional sites should also factor in snake awareness during warmer months, fatigue management for workers doing long shifts or FIFO rotations, and the cyclone or bushfire smoke risks that can suddenly change the working environment in northern and southern regions respectively. Treating these as routine items on the hazard sheet, rather than afterthoughts, signals a mature safety culture.

Scoring the Risks and Picking the Right Controls

Once hazards are on the list, each one needs to be assessed for likelihood and consequence and given a risk rating. A simple matrix with descriptors such as rare to almost certain for likelihood and insignificant to catastrophic for consequence is common, though some Australian manufacturers adopt more detailed scoring aligned with AS/NZS ISO 31000. The score itself is less important than the consistency with which it is applied, and the conversation that forces a team to think carefully about how bad an outcome would be and how often it could realistically occur.

The hierarchy of controls should then be applied in order. Eliminate the hazard entirely if the process can be redesigned to remove it, for example by choosing a water-based solvent instead of a flammable one. Substitute with a less hazardous material or a lower-energy process. Isolate the hazard behind a guard, interlock or barrier. Apply engineering controls such as local exhaust ventilation, guarding, or two-hand controls. Use administrative controls like safe operating procedures, training, signage and supervision. Only after all of these have been considered should personal protective equipment be specified, because PPE relies on people getting it right every single time.

Australian safety culture has a long history of the she'll-be-right attitude, and the hierarchy of controls is the best antidote to it. PPE is the easiest control to reach for, but it is also the least reliable. A well-written risk assessment will show the journey up the hierarchy, the options that were considered and discarded, and the reasons why the chosen control is the most effective reasonably practicable option. That paper trail is what regulators and insurance assessors look for when something does go wrong.

Writing It Down and Consulting the Workforce

Documentation is where many assessments fall over. The risk assessment register should clearly identify the process, the date of the assessment, the people involved, the hazards, the risk ratings before and after controls, and the specific controls applied. Each control should have an owner, a due date and a way of verifying that it has actually been implemented. A short, sharp layout that supervisors can scan during a pre-start meeting is more useful than a forty-page document that gathers dust in the quality manager's office.

Consultation is not a box-tick. Under the WHS Act, the PCBU must consult with workers and any HSRs about hazards, controls, and changes that affect health and safety, and the assessment should record who was consulted, what they said, and how their input shaped the outcome. In practical terms, this means running the assessment in a room with the operators, taking notes, and reflecting their feedback in the final document. If a worker raises a concern about, say, a new solvent's smell during the afternoon shift, the assessment needs to show how that was addressed, not just that the meeting happened.

A useful Australian habit is to keep a one-page summary of the risk assessment pinned near the process itself, in plain English rather than in safety jargon. Operators, contractors and supervisors can then read what the hazards are, what the critical controls are, and what to do if something goes wrong. Plain language and visible communication are themselves administrative controls, and they tend to stick better than a memo buried in the shared drive.

Reviewing, Monitoring and Updating the Assessment

A risk assessment is a living document. It should be reviewed whenever the process changes, when an incident or near miss occurs, when new information about a chemical or piece of machinery comes to light, or at set intervals such as annually. For a new manufacturing process, the first six months are usually the most informative, because the actual operating conditions often differ from what was anticipated during design. Heat in the plant, dust ingress, operator behaviour and maintenance practices all reveal themselves once the line is running for real.

Monitoring should be built into the controls themselves. If a control is local exhaust ventilation, monitor airflow and filter condition. If the control is a safe operating procedure, monitor through observations and short, sharp supervisor checks. If the control is training, monitor through competency assessments and refresher attendance. Records of these checks form the evidence that the controls are working and provide the trigger to update the assessment when they are not.

Trigger for Review	When It Typically Happens	What the Team Should Do
Scheduled review	Every 12 months, or sooner for higher-risk processes	Reconfirm hazards, update controls, re-consult with workers
Process or equipment change	New machine installed, new chemical introduced, layout altered	Reassess affected hazards, revise controls, retrain operators
Incident or near miss	Any injury, dangerous incident, or reported near miss	Investigate root cause, update assessment, communicate changes
New external information	Updated Safe Work Australia guidance, new AS/NZS standard, supplier SDS change	Check relevance, update document, brief workers
Worker concern raised	Through an HSR, supervisor or toolbox talk	Document the concern, assess validity, respond in writing

Industry groups such as the Australian Industry Group and the National Safety Council of Australia publish guidance and case studies that can help benchmark controls. Local TAFEs and registered training organisations, including specialist industrial centres such as HCF CATCH, also run courses in WHS, risk management and process safety that build the in-house capability to do this well. Building that capability is what turns risk assessment from a compliance chore into a genuine tool for keeping people safe.

Looking to bring a new process online safely? HCF CATCH delivers hands-on training in risk assessment, confined space entry, working at heights, electrical safety and process plant operations, all delivered in a realistic live-plant environment. Get in touch with the centre to discuss how the team can support your next project, from a single risk assessment workshop through to a full apprentice programme that develops the next generation of Australian process safety talent.