IETM Levels Explained: From Level 1 to Level 5
Level 5 Anyone researching Interactive Electronic Technical Manuals (IETMs) quickly runs into a recurring term: "levels." Documentation is described as Level 1, Level 2, all the way up to Level 4 or 5, but what actually changes between these levels, and why does it matter which one an organization chooses? The basic idea behind IETM levels The level system is essentially a way of describing how interactive and structured a piece of technical documentation is. Historically, this classification (and in India, formalized under standards like JSG 0852) was used to define exactly what capabilities a defence contractor needed to deliver alongside their equipment. Newer approaches sometimes favor a "functionality matrix" instead of strict levels, specifying required features directly (search, multimedia, diagnostics, etc.), but the level terminology remains widely used and understood. CODEANDPIXELS.NET IETM@CODEANDPIXELS.NET 9849527706 Page 2
At the most basic tier, a Level 1 IETM is essentially a digital copy of a paper manual, think a straightforward PDF or scanned document. It's electronic, technically, but it doesn't offer meaningful interactivity. You still read it top to bottom or use basic PDF search. Level 2: Cross-referenced navigation Level 2 introduces hyperlinked cross-references. Instead of reading "see page 47 for details," a user clicks a link and jumps directly there. This is a meaningful usability improvement over Level 1, though the underlying content is still relatively static and linear. Level 3: Structured, database-driven content At Level 3, documentation starts moving away from a linear, page-based structure toward a database-driven model. Content is broken into modular, tagged elements, enabling more powerful search by part number, fault code, or keyword, rather than relying on a table of contents or basic full-text search. Level 4: Fully interactive IETM Level 4 become genuinely dynamic. This tier typically includes: • Interactive diagrams (click a component to see specs or related procedures) • Embedded multimedia, video walkthroughs, animations, sometimes 3D models • Role-based content views for different user types (operator vs. maintainer vs. administrator) • Integration with diagnostic tools or equipment data Level 4 is often the target for modern defence and aerospace contracts, since it balances strong usability with manageable development complexity. Level 5: Predictive and integrated Where used, Level 5 pushes further into automation sometimes incorporating real-time equipment data, predictive maintenance triggers, or tighter integration with broader fleet-management systems. This tier is less universally defined than Levels 1–4 and tends to be customized heavily to the specific platform and use case. CODEANDPIXELS.NET IETM@CODEANDPIXELS.NET 9849527706 Page 3
There's a common misconception that "higher level is always better." In practice, the right level depends on: • Equipment complexity: a simple piece of machinery may not justify Level 4 development effort. • Operational environment: field technicians under time pressure benefit disproportionately from higher interactivity. • Compliance requirements: some defence contracts explicitly specify a required level or functionality matrix. • Budget and timeline: Level 4/5 development is significantly more resource-intensive than Level 2/3. Why this classification still matters Even as the industry shifts toward functionality-matrix thinking, the level system remains a useful shorthand for procurement teams, OEMs, and documentation vendors to quickly communicate roughly what kind of manual is being discussed. Understanding what each level actually involves rather than treating it as an abstract label makes it much easier to scope a documentation project realistically and avoid both over- and under-building relative to actual operational needs. CODEANDPIXELS.NET IETM@CODEANDPIXELS.NET 9849527706 Page 4
IETM@CODEANDPIXELS.NET 9849527706 Page 5
Fleepit Digital © 2021