Process Performance Metrics Series Issue 2: Process Cost Analysis — The Economic Account Behind a Process Map

Introduction

In the previous issue, we established a three-dimensional framework for process performance metrics — efficiency, quality, and cost. Among these three dimensions, cost is often the most overlooked, yet it is the one that garnishes the most attention from management.

Why? Because any management action a company takes ultimately needs to answer one core question: Is this investment worth it?

The greatest challenge in process management lies precisely here: optimizing processes requires investment in manpower and time, upgrading IT systems requires funding, and organizational restructuring needs managerial support — all these actions require "spending money," but the benefits of process optimization are hard to quantify.

In this issue, we will delve into the systematic analysis of process costs to help you "settle the process account" and provide a solid basis for process optimization.

1. The Big Picture of Process Costs: More Than Just "How Much Was Spent"

Process costs are not simply "how much was spent to do this task." A comprehensive process cost analysis needs to be conducted at three levels.

Level One: Direct Operating Costs

This is the most superficial and easiest cost to focus on — the direct resource inputs required to maintain process operations.

Level Two: Failure Costs — The Price of "Going Wrong"

Failure costs often constitute the largest proportion of total process costs, yet they are the easiest to overlook.

• Internal Failure Costs: Costs incurred from correcting errors discovered during process execution

  • Incorrect forms returned for re-filling, incorrect purchase orders requiring modification
  • Production rework, scrap, and re-inspection
  • Approval processes being returned due to incomplete information and requiring resubmission

• External Failure Costs: Losses caused by process errors being passed to customers or downstream stages

  • Customer penalties due to delayed delivery
  • Returns and claims due to quality issues
  • Hidden losses from decreased customer satisfaction (customer churn)

Key Insight: Although opportunity costs are difficult to measure precisely, in highly competitive industries, their impact often exceeds the total of direct operating costs and failure costs.

2. Quantifying Process Costs: From Vague to Clear

Method One: Activity-Based Costing (ABC)

Activity-Based Costing (ABC) is the most classic method for process cost analysis. The core idea is:

1. Identify all activities in the process
2. Determine the resource consumption of each activity
3. Allocate resource costs to activities
4. Allocate activity costs to process outputs

Case Study: ABC Analysis of the Procure-to-Pay (P2P) Process

Key Finding: The approval stage accounts for over 50% of the cost. If the approval process can be simplified or parallelized, there is significant room for cost savings.

Method Two: Process Cost Waterfall Chart

Break down the total process cost into contributions from each stage and visualize it using a waterfall chart. This method is particularly useful for identifying "cost black holes."

Total Process Cost CNY 180 → Request CNY 31 → Approval CNY 91 → Order CNY 23 → Receipt CNY 12 → Invoice CNY 16 → Payment CNY 8
                                                     ↓
                                            Cost Contribution Analysis:
                                            Approval Stage 51%
                                            Request Stage 17%
                                            Order Stage 13%

Method Three: Cost of Quality (COQ)

Integrate process costs with quality losses to form the best bridge between the "quality" and "cost" dimensions.

Key Principle: When external failure costs are excessively high, increasing prevention costs typically yields a leverage benefit of 5～10 times. This principle has proven effective in process optimization.

3. Case Study: Cost Reduction in an Approval Process

Case Background: A manufacturing company's equipment procurement approval process has an average cycle time of 12 days, and management complains, "It takes two weeks to approve even a screw purchase."

Current Cost Analysis (ABC Method):

Internal Failure Costs: Returns for re-approval due to incomplete information in the approval stage, approximately 40 orders (20%) per month, additional cost CNY 9,400/month

External Failure Costs: Urgent order fees from suppliers due to approval delays, CNY 5,000/month

Total Process Cost: CNY 47,000 + CNY 9,400 + CNY 5,000 = CNY 61,400/month

Optimization Plan:

1. Tiered Approval by Amount: Purchases ≤ CNY 50,000 require only Level One approval, purchases between CNY 50,000 and CNY 500,000 require two levels, and purchases > CNY 500,000 require three levels.
2. Introduce an electronic approval system to automatically verify information completeness (reduce returns).
3. Set approval SLAs: Each level of approval should not exceed 4 hours.

Post-Optimization Results:

This case study illustrates two core conclusions: First, tiered approval is more economical than a one-size-fits-all approach; second, preventive investment (system auto-verification) significantly reduces failure costs.

4. Five Best Practices for Process Cost Analysis

1. Start with a Cost Heat Map, Then Dive into ABC

Don't try to precisely calculate every stage from the beginning. Start with a qualitative assessment to create a cost heat map, and then focus on the "suspect areas" for deeper analysis.

2. Focus on "Small Batch, High Frequency" Processes

Many high process costs come from processes that seem insignificant but occur multiple times daily — such as travel expense reimbursement and office supply requisition. Their single-instance costs are small, but when multiplied by the annual occurrence volume, the numbers are staggering.

3. Use "Process Cost Rate" for Horizontal Comparison

$$ ext{Process Cost Rate} = frac{ ext{Total Process Operating Cost}}{ ext{Process Output Value}} imes 100%$$

This ratio can be used to compare the performance levels of similar processes. For example, the P2P process cost rate of leading companies in the industry is approximately 0.5～1%, whereas if your company's rate is 2～3%, it indicates a clear need for improvement.

4. Make Failure Costs Visible

Most companies' cost reports only record direct operating costs. It is recommended to list quality costs separately in monthly business analysis to make failure costs "undeniable."

5. Cost Analysis Must Be Linked to Business Value

Don't analyze for the sake of analysis. The ultimate goal of process cost analysis is to answer three questions:

• Which processes have the highest costs? → Identify optimization priorities
• How much can be saved after optimization? → Quantify ROI
• Can the savings create greater value? → Determine if the investment is worthwhile

5. From "Setting the Account" to "Driving Change"

The value of process cost analysis goes far beyond just producing a cost report.

When a quality manager presents data to management, saying, "Our P2P process approval stage costs CNY 47,000 per month, and tiered approval can save more than half of that" — this data is more persuasive than any management theory.

Process cost analysis, in essence, uses financial language to articulate management needs. It transforms process optimization from a "management concept" into an "investment decision," providing quantitative ROI support for optimization plans.

This is why we say: Process cost analysis is the management ledger that quality professionals present to their bosses.

Knowledge Number: 3.3.3

Version: v20260529

Author: Excellence Quality Think Tank