CSP-11 CSP-11 D3.02 · Domain 3 · Risk Management · 15%
PHA
A covered solvent unit has a pump FMEA, but the last process review never tested loss of cooling, high temperature, relief assumptions, or interactions between safeguards. Operations proposes calling the FMEA the entire PHA. As the CSP, choose the analysis scope and method needed to evaluate the process rather than only one component.
Updated . Independent CSP-11 practice. Not BCSP-endorsed. No pass guarantee.
Decision rule
PHA is a team method on a process. Pick the tool that can still change the design.
HAZOP, what-if, checklist — after steel is ordered they become binders.
In 20 seconds
- PHA is a team method on a process.
- Pick the tool that can still change the design.
- PHA examines process hazards systematically (what-if, HAZOP, checklist, etc.).
- Choose the method that fits complexity and life-cycle stage.
How to apply PHA
THEORY: Process hazard analysis for covered processes and good practice elsewhere. Guide words find deviations. LOPA tests layers. CALC: None unless a target frequency is given. FIELD: HAZOP scheduled after fabrication ‘to document residual.’ Pull it forward. ASSESS: PPE FMEA as the PHA is the trap.
Worked case
Wrong first move: File last year’s PHA after a pump change. Correct move: Reopen the node; write findings onto the P&ID.
Why the rule holds
Related: 03, 23, 87.
Same rule, different setting
Operations proposes reusing a separator FMEA as the entire PHA for a covered toxic process, but the unit deviations and safeguards are not addressed.
A plant modification changes a covered chemical process. The team proposes using an old equipment FMEA without assessing the tie-in and process deviations.
Picture / model
Choose a PHA technique that fits the process and decision, use a qualified multidisciplinary team to trace deviations or failures through consequences and safeguards, close recommendations, and distinguish periodic PHA revalidation from immediate management of change.
Exam traps
Original SafePath contrasts for PHA. These are study traps, not recalled BCSP items.
| Trap | Correct read |
|---|---|
| PHA | Process-unit systematic analysis — method matched to complexity |
| JHA | Job steps, not nodes and deviations |
| FMEA | Single-point modes; optional PHA method, not automatic SIS logic |
| Fault tree analysis | A permitted method for logical combinations leading to a top event |
Field move
OSHA permits FMEA and other methodologies; adequacy depends on whether the chosen analysis covers applicable process hazards and 1910.119(e)(3) factors.
Scenarios
Scenario 1 · Fundamental · CSP-11 D3.02
A pump FMEA covers seal failure but omits loss of cooling and toxic overpressure for the covered process. Which PHA decision is strongest?
Best action: Select one or more appropriate PHA methods that examine process deviations and safeguards, retaining useful FMEA findings.
Why: OSHA permits FMEA and other methodologies; adequacy depends on whether the chosen analysis covers applicable process hazards and 1910.119(e)(3) factors.
Scenario 2 · Applied Scenario · CSP-11 D3.02
For a covered distillation process, a supervisor presents a signed JHA for filter replacement as the complete PHA. What is missing?
Best action: The JHA covers a job; the PHA must systematically assess the covered process using an appropriate method.
Why: A task sequence can support maintenance planning, but the PSM PHA addresses hazards of the covered process.
Scenario 3 · Applied Scenario · CSP-11 D3.02
A reactor PHA identifies a credible runaway with large toxic inventory. A feasible inventory reduction is being evaluated alongside an additional alarm. What should the team recommend?
Best action: Document and assess inventory reduction at the source, and evaluate remaining safeguards and residual risk.
Why: A feasible reduction of hazardous inventory can reduce consequences at the source; evaluate feasibility and residual safeguards rather than treating an alarm as equivalent.
If the stem says this
| Stem signal | Best direction |
|---|---|
| design can still change | run PHA early enough to influence drawings |
| recommendations have no owners | assign owners and due dates |
| only checklist is used on a complex reactive process | select a richer method |
| MoC altered chemistry | revalidate PHA |
| two answers work | higher hierarchy / system / design |
Check before you leave
- ✓ PHA examines process hazards systematically (what-if, HAZOP, checklist, etc.).
- ✓ Choose the method that fits complexity and life-cycle stage.
- ✓ Recommendations need owners and closure tracking.
- ✓ PHA team competence and diversity matter.
- ✓ Update and revalidate at least every five years; assess applicable changes through MoC.
- ✓ Independent layers and hierarchy should appear in recommendations.
Blueprint mapping
PHA is the SafePath study class for CSP-11 D3.02 inside CSP-11 Domain 3, Risk Management (15%). CSP-11 expects safety professionals to evaluate risk systematically, select mitigation strategies, understand financial risk treatment, and keep risk under active review.
SafePath uses the publicly posted CSP-11 outline as a study map. It does not reproduce official exam content, and it is not affiliated with or endorsed by BCSP or Pearson VUE.
Practice / flashcards / formulas
More classes in Risk Management
Nearby lessons mapped to the same CSP-11 domain.
CSP-11 D3.02
Other classes on this task
Guides that use PHA
- CSP practice questionsOriginal scenario items mapped back to classes
- CSP-11 exam prep guideDomain weights, sample items, and a study sequence
- CSP-11 blueprint and weightsSeven published domains and the class map
- Seven-domain study directoryScope, tasks, and links into each lesson
- How to study for the CSP examA 16–24 week independent study plan
PHA study questions
- What decision does the PHA class train?
- PHA is a team method on a process. Pick the tool that can still change the design. This is independent SafePath CSP practice for CSP-11 D3.02. It is not an official BCSP item and it is not a pass guarantee.
- What exam trap shows up in PHA?
- A common miss treats this as sufficient: PHA The stronger read is: Process-unit systematic analysis — method matched to complexity
- How does PHA map to the CSP-11 blueprint?
- SafePath maps this class to CSP-11 D3.02 in Domain 3, Risk Management (15% of the published blueprint). Use the public outline for study planning. SafePath is not affiliated with or endorsed by BCSP.
Verify
Verify: Confirm current certification requirements with BCSP and technical requirements with the cited authoritative standard.