5x5 Risk Matrix Examples for Job Hazard Analysis

5x5 Risk Matrix Examples for Job Hazard Analysis

A risk score is only useful if the people doing the work understand how it was reached. That is the real strength of the 5x5 risk matrix: it turns a vague sense of "this feels dangerous" into a defensible number that a crew can discuss, challenge, and act on. When you build it into a Job Hazard Analysis (JHA) or a broader Hazard Identification and Risk Assessment (HIRA), every task step gets the same consistent treatment, and your highest risks rise to the top where they belong.

This guide explains how the 5x5 matrix works, then walks through four full worked examples across construction, warehouse, maintenance, and office tasks. You can follow along and score your own tasks using our 5x5 risk assessment matrix tool, which calculates scores and bands as you enter likelihood and severity.

What a 5x5 Risk Matrix Is

A 5x5 risk matrix rates two dimensions of risk on a scale of 1 to 5 and multiplies them together:

Risk Score = Likelihood (1-5) x Severity (1-5)

The result is a number between 1 and 25 that maps to a risk band, typically Low, Medium, High, or Extreme. Plotting likelihood across one axis and severity down the other produces the familiar grid below, with each cell colored according to its score.

Likelihood \ Severity	1 Negligible	2 Minor	3 Moderate	4 Major	5 Catastrophic
5 Almost Certain	5	10	15	20	25
4 Likely	4	8	12	16	20
3 Possible	3	6	9	12	15
2 Unlikely	2	4	6	8	10
1 Rare	1	2	3	4	5

A common way to translate scores into action is:

Risk Score	Band	Typical Action
1--4	Low	Acceptable; manage through routine procedures
5--9	Medium	Add controls; assign corrective actions with owners and dates
10--15	High	Priority action required; escalate to management before proceeding
16--25	Extreme	Stop or do not start; reduce risk before work continues

It is worth being precise about one point: there is no single OSHA-mandated 5x5 table. The 5x5 matrix is a widely used industry convention, and the specific descriptors, score-to-band cutoffs, and acceptability thresholds are defined by each organization. Two companies can both run "a 5x5" and draw the Low/Medium/High lines in different places. Document your scales so everyone scores consistently.

The Likelihood Scale

Likelihood describes how probable it is that the hazard leads to the harmful outcome you are evaluating:

Rating	Descriptor	Definition
1	Rare	Could occur only in exceptional circumstances
2	Unlikely	Could occur but is not expected under normal conditions
3	Possible	Could occur at some point
4	Likely	Will probably occur in most circumstances
5	Almost Certain	Expected to occur regularly or repeatedly

The Severity Scale

Severity describes how serious the consequences would be if the incident did happen:

Rating	Descriptor	Definition
1	Negligible	Minor first aid, no lost time
2	Minor	Medical treatment, short-term lost time
3	Moderate	Serious injury, extended lost time or restricted duty
4	Major	Permanent disability or hospitalization
5	Catastrophic	Fatality or multiple fatalities

How the 5x5 Fits Into a JHA and HIRA

A Job Hazard Analysis (JHA), also called a Job Safety Analysis (JSA), breaks a task into sequential steps and identifies the hazard at each step. The 5x5 matrix is the scoring engine inside that structure. For every step you ask:

1. What is the hazard at this step?
2. How likely is it to cause harm (1-5)?
3. How severe would that harm be (1-5)?
4. Likelihood x Severity gives the initial risk score and band.
5. Apply controls using the hierarchy of controls.
6. Re-score with the controls in place to get the residual risk.

The same logic scales up to HIRA (Hazard Identification and Risk Assessment), which applies across processes, areas, and tasks rather than a single job. HIRA and JHA are not competing methods; a HIRA program is typically the umbrella, and individual JHAs are where the 5x5 scoring gets applied step by step on the floor. Capture each task analysis on a structured JHA form so the scoring, controls, and residual risk are documented and shareable.

The key discipline is scoring residual risk, not just initial risk. Controls only count once they are actually in place, verified, and being followed.

Four Worked Examples

Each example below moves from task step to hazard, to an initial likelihood x severity score, to controls drawn from the hierarchy of controls (elimination, substitution, engineering, administrative, PPE), and finally to a residual risk score after those controls. The numbers reflect one reasonable interpretation; your own organization's thresholds and descriptors may shift them.

Example 1: Construction -- Working at Height on a Leading Edge

Task step: Installing decking along an unprotected leading edge on the third floor of a structure under construction.

Hazard: Fall from height to a lower level.

Initial assessment: A leading edge with no fall protection is a classic Fatal Four hazard. Without controls, a worker stepping near the edge could fall. Likelihood is Likely (4) given repeated movement near the open edge, and severity is Catastrophic (5) because a third-floor fall can be fatal.

Initial risk score: 4 x 5 = 20 (Extreme) -- do not proceed as-is.

Controls (hierarchy of controls):

• Engineering: Install guardrail systems or a safety net system along the leading edge where feasible.
• Engineering/PPE: Where guardrails are not feasible, use a personal fall arrest system with anchor points, full-body harness, and properly rated lanyard.
• Administrative: Establish a controlled access zone, train workers on tie-off procedures, and inspect harnesses before each use.

Residual assessment: With a personal fall arrest system correctly anchored and used, the likelihood of a free fall to a lower level drops to Unlikely (2). Severity remains high but is reduced because arrest limits the fall; rate it Major (4).

Residual risk score: 2 x 4 = 8 (Medium) -- proceed with documented controls and monitoring.

Example 2: Warehouse -- Forklift and Pedestrian Interaction

Task step: Order pickers walking through aisles while forklifts move pallets in the same shared space.

Hazard: Pedestrian struck by a forklift.

Initial assessment: Mixed forklift and foot traffic in tight aisles with limited sightlines is a leading cause of warehouse fatalities. With no separation, likelihood is Likely (4) and severity is Catastrophic (5).

Initial risk score: 4 x 5 = 20 (Extreme).

Controls (hierarchy of controls):

• Elimination/Engineering: Physically separate traffic with barriers, marked pedestrian walkways, and one-way routes; install convex mirrors at blind corners.
• Engineering: Fit forklifts with motion alarms, blue spot lights, and speed limiters.
• Administrative: Enforce right-of-way rules, require eye contact and horn use at intersections, and schedule picking and lift operations in separate windows where possible.
• PPE: High-visibility vests for all floor personnel.

Residual assessment: With segregated walkways, mirrors, speed limits, and high-vis enforcement, likelihood falls to Unlikely (2). Severity stays Catastrophic (5) because a strike, though far less probable, can still be fatal.

Residual risk score: 2 x 5 = 10 (High) -- acceptable only with active supervision and continued monitoring of near misses.

Example 3: Maintenance -- Lockout/Tagout on Energized Equipment

Task step: Clearing a jam inside a conveyor drive that is connected to a live electrical and mechanical energy source.

Hazard: Unexpected energization or start-up causing electrocution, crushing, or amputation.

Initial assessment: Reaching into machinery that could start without warning exposes the worker to multiple energy sources. Likelihood of a serious event without lockout is Possible (3) to Likely (4); use Likely (4). Severity is Catastrophic (5).

Initial risk score: 4 x 5 = 20 (Extreme).

Controls (hierarchy of controls):

• Engineering/Administrative: Apply a full lockout/tagout (LOTO) procedure -- shut down, isolate all energy sources, lock and tag each isolation point, and release stored energy.
• Administrative: Verify zero energy state by attempting a start before work, use authorized-employee-only locks, and follow a written equipment-specific procedure.
• PPE: Appropriate electrical and mechanical protective equipment as the procedure requires.

Residual assessment: With verified LOTO applied, the equipment cannot energize while the worker is exposed. Likelihood drops to Rare (1). Severity if a control failed remains Catastrophic (5).

Residual risk score: 1 x 5 = 5 (Medium) -- proceed under a verified, audited LOTO program. Note how the score stays above Low because the consequence of any procedural failure is severe; this is why LOTO audits matter.

Example 4: Office -- Ergonomic Workstation Strain

Task step: Data-entry staff working at a computer workstation for most of an eight-hour shift.

Hazard: Musculoskeletal disorder from awkward posture, repetitive motion, and prolonged static loading.

Initial assessment: Poorly set-up workstations contribute to wrist, neck, and back strain over time. Likelihood of some strain developing without intervention is Likely (4), but severity is generally Minor (2) -- medical treatment and short-term lost time rather than life-altering injury.

Initial risk score: 4 x 2 = 8 (Medium).

Controls (hierarchy of controls):

• Engineering: Provide adjustable chairs, monitor arms set to eye level, keyboard trays, and document holders.
• Administrative: Train staff on neutral posture, schedule micro-breaks and stretch reminders, and rotate tasks to vary muscle use.
• Administrative: Offer individual ergonomic assessments for workers reporting discomfort.

Residual assessment: With proper adjustment and break scheduling, likelihood drops to Unlikely (2) and severity to Negligible (1).

Residual risk score: 2 x 1 = 2 (Low) -- acceptable; manage through routine ergonomic checks.

These four examples show a pattern worth noticing: high-severity tasks like falls, forklift strikes, and energized maintenance can still carry meaningful residual scores even after strong controls, because the consequence of any failure remains severe. Lower-severity hazards like ergonomic strain can usually be driven into the Low band. That contrast is exactly what the matrix is meant to surface.

Reading the Results Honestly

A 5x5 matrix is a communication and prioritization aid, not a precision instrument. The scores depend on the judgment of the people assigning them, and the band cutoffs are organizational decisions. Use the matrix to support planning and crew discussion, to compare tasks, and to document why a control was chosen -- but never as a substitute for the judgment of a competent person who knows the work, the equipment, and the site conditions. If an experienced worker says a "Medium" task does not feel right, that signal outranks the number.

A few practices keep the tool trustworthy:

• Score residual risk only after controls are confirmed in place, not when they are merely planned.
• Reassess when conditions change -- new equipment, new crew, weather, or schedule pressure can all move a score.
• Document your scales and thresholds so two assessors reach the same number for the same task.
• Treat any Extreme score as a stop point until the risk is reduced, regardless of schedule.

Put the Matrix to Work

The 5x5 risk matrix earns its place because it makes risk visible, comparable, and discussable across every task in a JHA or HIRA. Build it into your task analyses, score both initial and residual risk, and let the highest numbers drive where you spend your control effort first.

Ready to score your own tasks? Use our 5x5 risk assessment matrix tool to calculate likelihood-by-severity scores and bands instantly, then capture the full step-by-step analysis on our JHA form so your hazards, controls, and residual risk are documented and ready to share with the crew.