Which of the following methods would we use if we wanted to ensure 'a user defined coefficient' ? (Select One)

The Fixed allocation method, also known as fixed weighting, distributes shared costs based on a pre-determined, static set of weights or percentages. These weights are the "user defined coefficients" that are agreed upon by stakeholders. This method is used when costs need to be split in a consistent, predictable manner that does not change with fluctuations in usage, making it ideal for negotiated chargeback models or when proportional metrics are unavailable or inappropriate.

A. Target Split: This method allocates 100% of a specific cost to a single, pre-defined target or business unit, rather than splitting it among multiple targets using a coefficient.
C. Even Split: This method divides costs equally among all tenants. The coefficient is determined by the number of tenants (1/n) and is not flexibly defined by a user.
D. Proportional: This method allocates costs based on the relative consumption of a resource (e.g., CPU, memory). The coefficient is dynamic and calculated based on usage, not pre-defined by a user. ---

1. Storment, J.R., Fuller, M., & Quinn, C. (2023). Cloud FinOps: Collaborative, Real-Time Cloud Financial Management (2nd ed.). O'Reilly Media, Inc.

Reference Details: In Chapter 7, "Managing Shared Cost," the section "Allocation Methodologies" describes "Fixed Weighting." It states, "Another method is to assign a fixed weighting to each of the tenants and split the cost according to those weights... These weights are typically determined by some form of negotiation or agreement between the teams..." This directly corresponds to using a "user defined coefficient."

2. FinOps Foundation. (2023). FinOps Framework: Inform Phase. FinOps Foundation Docs.

Reference Details: Within the documentation for the "Cost Allocation (Showback and Chargeback)" capability, the framework discusses various methodologies for handling shared costs. The concept of fixed allocation is presented as a primary method where costs are distributed according to a pre-agreed logic, distinct from dynamic methods like proportional allocation. This aligns with the principle of a user-defined, static coefficient.