Planning and allocation roles from A to Z — the O page of the category index
O is the letter most likely to bring a planning student to the wrong page, because the category's most famous O phrase — open-to-buy — is a tool of the planning trade, not a job in it. No planning or allocation role description in this category begins with O. This page explains where open-to-buy actually belongs, and points onward to the fourteen roles that do the work.
More Planning Job Descriptions by Letter:

No Planning and Allocation role descriptions begin with the letter O. The category's roles are filed under A, C, F, I, M, P, R and S; the letter bar above links to the matching sections of the Planning and Allocation hub.
Open-to-buy is the money a buyer may still spend on stock for a delivery period after orders already placed are counted against the plan. It is calculated, guarded and traded by the Merchandise Planner, whose description under M explains the concept in its working context, and it is overseen across departments by the Planning Manager under P. A visitor who arrived at O looking for open-to-buy will find it there — as the central balancing act of the planner's role, not as a standalone occupation.
Either side of this empty letter, the category is full: M holds market analysis, merchandise planning and the combined planning and allocation function; P holds planning management and project analysis; and A, C, F, I, R and S complete the fourteen. The Planning and Allocation hub gathers them on one page. An index that skipped its quiet letters would hide this shape, which is why O keeps its page, labelled empty, between them.
None. The Planning and Allocation category's 14 role descriptions begin with A, C, F, I, M, P, R or S, and the O page exists to keep the alphabetical index complete.
In the Merchandise Planner description under M, where open-to-buy is the planner's central budget discipline, and in the Planning Manager description under P, where it is managed across departments.
The Planning and Allocation hub lists all 14 roles on one page under anchored letter sections. The letter bar near the top of this page also links to each letter's section.