Starting with the project purpose, an "if-then" objective tree analysis should be used as the basis for developing the summary narrative portion of the Logical Framework, covering outputs and inputs and including key assumptions.

As the three-part diagram on the kit’s CDCS to Project Linkages page indicates, USAID expects that in many cases the Goal, Purpose and any Sub-Purpose of a project that is included in a Logical Framework will be drawn from the Results Framework a Mission presented in its CDCS. An Objective Tree is a useful aid for working through “how” or by what means a project’s Purpose and any Sub-Purpose will be achieved. Outputs that are critical for realizing these objectives are shown as parallel results on an Objective Tree.

When transitioned into the Narrative Summary column of a Logical Framework, results at all levels are, by convention, stated in the past tense, as if they have already been achieved. Inputs, which are not normally included in Objective Trees are included in the Narrative Summary column of a Logical Framework. By convention, Inputs, even when they describe equipment and other resources, are generally stated in process or action terms (provide, develop, initiate) rather than as results, as the trade facilitation project example below illustrates. Also by convention, Outputs, which are all shown at the same level in a Logical Framework, are usually numbered, and the numbering system used is then repeated at the Input level to make it clear to a reader which Inputs are associated with to each of a project’s Outputs.