。
She gave instructions for the plan to be drafted.
Literal
She [topic-は] plan [genitive-の] drafting [object-を] instructed.
立案 is an unusually compact noun: 立 ('stand up, establish') + 案 ('proposal') = 'drafting/formulating a plan.' It's a stiff, business-y word — natural in meeting minutes or project reports, but you'd sound bookish using it in casual speech. 指示する ('to instruct, to direct') is one verb in a tight cluster of near-synonyms — 指示・指図・命令・指揮・指導 — each occupying a slightly different niche. 指示 is the neutral 'give instructions about what to do,' the everyday workplace verb for top-down direction.