This guide can inform any partner that manages or supports public health supply chains. Ministries of health, technical assistance partners, or non-governmental organization (NGO) operating distribution systems can all benefit from conducting a costing exercise and can use the material presented in this guide to support their efforts.This guide serves as a companion to the project’s manual for the Supply Chain Costing Tool (SCCT), an Excel-based software application that supports supply chain costing analysis efforts. However, this guide presents a methodology that does not assume use of any particular costing.