Mission Profile Definition User Guide — Nomenclature, Introduction, and Workflow

Version: 3.9.1

1 Nomenclature

Term	Definition
LOI	Level of Indenture
MADE	Maintenance Aware Design Ecosystem
MEFL	Mission Effective Functions List
MPD	Mission Profile Definition
MTTF	Mean Time to Failure
PNG	Portable Network Graphics
RAM	Reliability, Availability & Maintainability
RBD	Reliability Block Diagram

2 Introduction

The Mission Profile Definition (MPD) editor is used to define the operational duration a system or item experiences for a specified mission profile or group, as well as mission success & functional criteria, and operating mode. This aggregated information is used for RAM analyses such as RBD analysis.

A mission profile allows the user to determine and define the mission parameters within which a system will operate. These may include time-based segmentations of a mission (phases & segments), quantitative parameters (e.g. velocity, volume), mission success criteria, and duty cycles for an item or group of items in a system. Mission profiles can be repeated multiple times using mission cycles, while multiple mission profiles can be aggregated into a mission group.

3 MPD Workflow

Figure 1 ("MPD Workflow") depicts "WF11: Create Mission Profiles":

Pre-requisites:

• A. Mission Parameters: Mission details including Mission phases/segments.
• B. FBD Model: System model containing components (See WF03-05).
• C. Unit Life Configurations: Model items configured to accept Unit Life input (See WF41).

Flowchart steps:

1. Open Mission Profile Definition
2. Create New Mission Profile
3. Enter MPD Details (fed by: Mission Profile Details, Documents & Images)
4. Create Mission Parameter(s) (fed by: Parameter Name(s), Parameter Units, Initial Value(s))
5. Create Mission Phases and Segments (fed by: Mission Phases, Mission Segments, Phase/Segment detail)
6. Create Specialized Phases (fed by: Specialized Phases, Assoc. Phases/Segments)
7. Create Mission Conditions (fed by: Operational Conditions, Environmental Conditions, Assoc. Phases/Segments, Assoc. Specialized Phases)
8. Create Mission Events (fed by: Assoc. Mission Conditions, Mission Events, Assoc. Phases/Segments, Assoc. Specialized Phases)
9. Create Mission Success Metric(s) (fed by: Mission Objectives, Success Criteria, Assoc. Flow Properties)
10. Define Functional Profile (fed by: Upper & Lower Limits, Importance Ranking)
11. Configure Duty Cycles (fed by: Duty Cycles)
12. Configure Unit Life Accrual (fed by: Number of Units)
13. All Mission Profiles Defined? → No: loop back to step 2 / Yes: continue
14. Create Mission Groups? → Yes: Create Mission Profile Groups (See WF69) / No: continue
15. Mission Defined → outputs: MEFL / Mission Profile Report

Detailed Descriptions:

1. Open 'Mission Profile Definition' under 'Modelling' in the menu or through the right-click context menu on the System item.
2. Select New button to create a mission profile.
3. Enter mission profile details & attach documents/image files.
4. Select the Plus icon to open mission parameter dialog. Enter parameter name, unit & initial value. Selected parameters are shown in the Mission Profile graph.
5. Create Phases & Segments to show in time profile graph by clicking green cube icon or yellow cube icon respectively — require name, duration, description & parameter values.
6. Create Specialized Phases via green plus icon. Each require a name, duration, description and selection of the associated phases and segments. Create Operational Conditions via green plus icon. Each require a name, description and selection of the associated phases and specialized phases. Create Environmental Conditions via green plus icon. Each require a name, environment, env. Characteristics and selection of associated phases and segments, specialized phases.
7. (Continued from above — this numbering follows the source PDF's Detailed Descriptions list, where item 7 covers creating Mission Events.) Create Mission Events via green plus icon. Each require a name, description, type, occurrence, justification and selection of the phases and segments, specialized phases, mission conditions.
8. Create mission success metrics via green plus icon. Each require a name, success criteria and association to one or more system flow properties.
9. Associate functional profile of each system functions to phases. Upper/lower property limits are entered, and functional importance terms are selected.
10. Configure duty cycles for each model item for a defined phase or segment.
11. Configure unit life accrual for each model item which have unit life failure distribution selected.
12. Mission Profiles for the project, representing the use cases of the system, has been created.

(Note: the source PDF's step numbering in the Detailed Descriptions panel is slightly offset from the flowchart numbering above, since two flowchart items — steps 6's three sub-bullets — are described together under description item 6, causing the panel descriptions to run 1–12 against 15 flowchart nodes. This is reproduced faithfully as printed.)

Outputs:

• MEFL / Mission Profile Report: Using the MADE Report Wizard, a Mission Effective Function List (MEFL) or Mission Profile report can be generated for a selected mission profile.