WF19: Prepare Model-based RCM Analysis

Pre-requisites

• A MADE Model: An RCM analysis is created (see WF75).

Detailed Descriptions (numbered steps)

1. In RCM Management tab, double-click on the RCM analysis to open it, if it is not already open.
2. For Model-based FMEA workflow, the active mission profile is selected by default. Review mission profile duration, mission cycles, mission parameter sum, and description. These parameters establish baseline & revised item reliability and availability metrics. To change the mission profile in RCM, first reset the active mission profile in Mission Profile Definition and then create a new version of the RCM analysis by clicking the version button in RCM Management tab. For FMEA excel import workflow, the mission profile is disabled.
3. Identify potential maintenance significant item(s) (MSI) to be included in RCM analysis. It can be refined by thresholding based on item properties such as Critical, Safety, Mission Critical, Loss of system, Baseline Reliability, and Baseline Inherent Availability.
4. Define operating context under which the MSI operates to tailor strategies to ensure optimal performance and reliability and the expected performance criteria and reliability standards that the MSI should meet. For model-based RCM analysis, mission phases, duration of operation, operational conditions and environmental conditions are summarized for MSI.
5. Select a function of the chosen MSI to initiate the Significant Function (SF) logic workflow to designate as significant function (SF) or not.
6. Assess the selected MSI function by answering a series of questions in the SF logic workflow to designate as SF and enter answer narrative. SFs require further assessment.
7. Select and open a failure mode for further assessment to determine its consequence, assigning task(s), technical feasibility of task(s) and task(s) selection.
8. RCM analysis is prepared. See WF20 to continue RCM analysis.

Fields referenced in the diagram

• Define Mission Context: Operating Context, Performance Standards
• Assess Maintenance Significant Item function: Answer narrative

Outputs

• Tracked Changes: Key changes made by the contributors during the analysis are logged chronologically and available for review.

Screenshot walkthrough (captions/labels extracted)

Step 1: Open RCM Analysis

• "Model-based RCM" — "RCM Management" tab: "RCM Analyses" table (Name/System/Configuration/Workflow Type): "Analysis 1" / "Vehicle System" / "MSG-3" / "Model-based FMEA". "RCM Analysis Details": Name "Analysis 1", Version "1", Description, Created "March 20 2026, 10:38:39 AEDT", Modified "March 20 2026, 10:48:06 AEDT", Configuration "MSG-3", Workflow Type "Model-based FMEA", System "[VS1] Vehicle System". "Mission Profile Definition": Mission Profile "Regular Trip", Duration "1.303 hr (1.303 hours)", Mission Cycles "1.00", Σ Total "112.00 Kilometers", Description "A short duration trip for the vehicle, assuming a benign environment and low operational loading."

Step 2: Review Mission Profile

• "Model-based RCM - Analysis 1 (PHMT)" — "RCM Analysis Details": Name "Analysis 1", Version "1", Description "The following analysis is based on the Regular Trip mission for maintenance costs. The main...", Created/Modified dates, Configuration "MSG-3", Workflow Type "Model-based FMEA", System "[VS1] Vehicle System". "Contributors" table: PHMT (Company "PHM Technology", Title "En...", Role "Reliability...", Description "Evaluates failure modes..."). "Mission Profile Definition": Mission Profile "Regular Trip", Duration "1.303 hr (1.303 hours)", Mission Cycles "1.00", Σ Total "112.00 Kilometers", Description as above. "Related Documents and Images": Documents table with "CA (MIL-STD-1629A, Quan..." attachment dated "March 20 2...". Left nav: RCM Management > Analysis 1 > Significant Item Search, Mission Context, Functional Failure Analysis, Trade Study, RCM Summary, RCM Audit.

Step 3: Identify Potential Maintenance Significant Item (MSI)

• "Significant Item Search" tab: "Basic" panel: Top Level "[VS1] Vehicle System", Indenture Limit "3". "Filter Settings": Filter Type "Item Criticality" dropdown, Threshold, "Add Filter" button; filter row "Critical Item" / Threshold "Yes" (with delete/clear icons). "Search" button. "Maintenance Significant Item Search Results" table (Item/Item Number/LCN/Risk/Severity/Reliability/Availability): Control Unit (Risk 1.9521E-7, Severity I, Reliability 0.9999987, Availability 0.9999966), Coupling 1 (6.5069E-7, I, 0.9999987, 0.9999990), Diesel Engine (0.9999940, 0.9999952), Driveline (1.6683E-6, I, 0.9999861, 0.9999949), Planetary Gearbox Rear (6.5E-7, I, 0.9999987, 0.9999990 — selected/highlighted), Power Generation (0.9999896, 0.9999889), Vehicle System (VS1, 0.9999831, 0.9999829). "Potential Maintenance Significant Items" panel (right): Item "Planetary Gearbox Rear", Completion 0%, Reliability 0.9999987, Availabil... 0.9999990.

Step 4: Define Mission Context

• "Mission Context" tab: "Mission Profile Overview" tabs Operational Metrics / Functional Profile (selected: Functional Profile). Time profile grid for "Planetary Gearbox Rear" showing Phase/Segment columns 1: Start-up (0hr) through 7: Shut-down (0sec), including 1.1 Ignition, 5.1 Highway (5.1.1 Highway A1, 5.1.2 Highway B2), 5.2 Mountain Terrain — with duration and percentage rows (0s(100%), 1m(100%), 15m(100%), etc.).
• "Maintainable Items" list: "Planetary Gearbox Rear". "Maintainable Item Context" tabs: Narratives (selected)/Phases and Segments/Operational Conditions/Environmental Conditions. "Operating Context:" narrative: "The gearbox operates under a regular trip mission profile, environmental factors include ambient temperatures ranging from -40°C to 55°C and relative humidity levels up to 90%. It is exposed to potential vibration and shock loads due to vehicle operation." "Performance Standards:" narrative: "Withstanding a minimum pressure threshold without deformation or leakage. Demonstrating damage under standard operating conditions."

Step 5: Select MSI Function

• "Functional Failure Analysis" tab: "Maintainable Item FMEA": Maintainable Item "Planetary Gearbox Rear". Note: "Complete the decision tree workflow to determine whether the Function is significant." Table (Function/Failure Mode, ID, Completion, Significant): "Store Mechanical - rotational Angular velocity" (0%, "Pending"). "Decision Tree Workflow" — "Safety/Environment Effect": "Does the loss of function have an adverse effect on safety or environment?" radio Yes/No (unset, placeholder "Set a narrative with a double-click...").

Step 6: Assess MSI Function

• Same tab: Function row now shows Completion 0%, Significant "Yes". "Decision Tree Workflow" — "Safety/Environment Effect": "Does the loss of function have an adverse effect on safety or environment?" — narrative "This function is critical for the safe and reliable operation of the vehicle. Loss of this function can have severe consequences" — Yes selected. "Significant Function" section: "The function has been identified as a Significant Function." (narrative placeholder "Set a narrative with a double-click...").

Step 7: Open Failure Mode

• Same tab: Table now shows "Store Mechanical - rotational Angular velocity" (0%, Significant "Yes") expanded to child row "Low Mechanical - rotational Angular velocity due to cracking of t..." (0%). "Decision Tree Workflow" panel shows placeholder icon and instructions: "Select a Maintainable Item and then a Function to proceed. Once a Function has been identified as significant, it can be opened for analysis by selecting the Function or its Failure Mode and clicking the 'Open' button, or simply double-clicking to open it for further analysis."

Track Changes

• "RCM Audit" tab: "Workflow - Completion Status" pie charts for Functions (Significant: 1), Failure Modes (Pending Decision: 1), Failure Effect Categories (Pending Decision: 1) — all shown fully red/pending. "Audit Log" table (Item/Item ID/Event/Date/Contributor/Narrative): "Analysis 1" — "Maintainable Item(s) (Planetary Gearbox Rear) added to Analysis (Analysis 1)" 2026/03/24 14:21:45, Contributor PHMT; "Store Mechanical - rotational Angular velocity" — "Decision Tree Option for Safety/Environment Effect changed from Unknown to Yes" 2026/03/24 14:29:08, Contributor PHMT.

Related workflows

• WF20 – Perform Model-based RCM Analysis
• WF75 – Create a Model-based RCM Analysis