公、私部門社會服務機構為了要在眾多社會需求中爭取到資源的優先配置權及獲取社會信任，有必要提出具有責信的方案。家暴防治體系長期處在社會期待與資源困窘的夾縫中，更迫切需要以具體數字呈現防治策略與方案本身的成本效益和效能，以促成資源的挹注和網絡的合作，而方案成本分析正是讓服務提供者掌握資源的流向及配置，以及計算成本效益與效能的第一步。在本土缺乏第一手、具公信力的服務成本資料的情況下，本研究以一個實施近 5年，已趨穩定運作的家暴安全防護網方案為例，採由下而上分析模式，透過詳細記錄研究設計與執行的脈絡、實際操作的過程，以及運算的邏輯和模式，討論在臺灣本土脈絡下可操作的方法，並提出計算社工專業人力與服務單位成本之架構，以逐步累積方案成本計算的知識。

To secure program resources and earn trust, social service agencies, public or private, need to demonstrate accountability in program delivery. Pressured by high societal expectations and insufficient resources, cost-efficiency and cost-effectiveness of domestic violence prevention programming are best to be supported by comprehensive cost related data. Availability of such data may promote better resource utilization and even collaboration among service providers. Cost analysis is the foundation for examining cost-efficiency and cost-effectiveness. Taiwan lacks reliable first-hand cost data in domestic violence prevention services. Using the format of “Research Notes”, this paper attempts to take “Safety Network Program” as an example to illustrate a framework for cost analysis for social work services, including detailed documentation of research design, implementation context, operational processes as well as arithmetic logic and pattern.