Editing Work breakdown structure (section)

====Coding scheme====
It is common for work breakdown structure elements to be numbered sequentially to reveal the hierarchical structure. The purpose of the numbering is to provide a consistent approach to identifying and managing the WBS across like systems regardless of vendor or service.<ref>MIL-STD-881C, Work Breakdown Structures for Defense Materiel Items, 3 October 2011, ¶4.3</ref> For example, 1.1.2 Propulsion (in the example below) identifies this item as a Level 3 WBS element, since there are three numbers separated by two [[Decimal separator|decimal points]]. A coding scheme also helps WBS elements to be recognized in any written context, such as progress tracking, scheduling, or billing, and allows for mapping to the WBS Dictionary.{{citation needed|date=April 2024}}  It is a preferred practice that the [[Statement of work]] or other contract descriptive include the same section terms and hierarchical structure as the WBS.

A practical example of the WBS coding scheme is<ref>MIL-STD-881C, Work Breakdown Structures for Defense Materiel Items, 3 October 2011 Appendix A, ¶A.3</ref>

''1.0 Aircraft System''
:''1.1 Air Vehicle''
::''1.1.1 Airframe''
:::''1.1.1.1 Airframe Integration, Assembly, Test, and Checkout''
:::''1.1.1.2 Fuselage''
:::''1.1.1.3 Wing''
:::''1.1.1.4 Empennage''
:::''1.1.1.5 Nacelle''
:::''1.1.1.6 Other Airframe Components 1..n (Specify)''
::''1.1.2 Propulsion''
::''1.1.3 Vehicle Subsystems''
::''1.1.4 Avionics''
:''1.2 System Engineering''
:''1.3 Program Management''
:''1.4 System Test and Evaluation''
:''1.5 Training''
:''1.6 Data''
:''1.7 Peculiar Support Equipment''
:''1.8 Common Support Equipment''
:''1.9 Operational/Site Activation''
:''1.10 Industrial Facilities''
:''1.11 Initial Spares and Repair Parts''