大綱

1. Origins, structure, and basic meaning

• Structure: 大綱(たいこう) is a noun for the broad outline of a plan or policy.
• Basic usage: It suits formal announcements or discussions of the main direction of reforms or business plans.

2. Common pitfalls and similar expressions

• The outline and the details
  • 計画の大綱 brings together a plan's central points and direction. As 細部を決める前に indicates in the example, the framework can be shared before the details are settled.
• 大綱 is a noun
  • In 大綱を公表する, を marks the noun naming what is published. It is not an adverb modifying a verb like 大体(だいたい), which can express approximation.