Value Chain and Value Stream Thinking
1. Business-User Summary
Business Process Management (BPM) is not just about drawing process boxes. It is about understanding where value is created, where delays happen, and where waste exists. To do this, we use two critical concepts: the Value Chain and the Value Stream.
2. What is a Value Chain?
A Value Chain is the full set of high-level activities a company performs to create, sell, deliver, and support a product or service. It represents the macro-level view of how a business operates.
Difference Between Value Chain and Process Flow
- Value Chain: Shows what a business does at a high level (e.g., Inbound Logistics, Operations, Outbound Logistics).
- Process Flow: Shows how the business executes a specific task step-by-step (e.g., how to receive goods in the warehouse).
3. What is a Value Stream?
A Value Stream is the sequence of actions required to deliver value to the customer. It takes the Value Chain and zooms in to categorize every single step based on whether it creates value for the end customer.
A value stream includes:
- Steps that add value — the customer benefits directly.
- Steps that do not add value but are necessary — required for control, compliance, or operations.
- Steps that are pure waste — should be reduced or eliminated.
4. Understanding Value Categorization
| Category | Symbol | Definition | Examples |
|---|---|---|---|
| Value-Added | 🟢 VA | Directly transforms the product in a way the customer pays for | Manufacturing, Assembly, On-time Delivery |
| Needed Non-Value-Added | 🟡 NNVA | Required for control, compliance, or logistics — but customer doesn't pay for it | Quality Inspection, Credit Check, Billing |
| Non-Value-Added / Waste | 🔴 NVA | Does not add value and is not required — eliminate or reduce | Waiting, Rework, Duplicate Entry, Wrong Data |
5. End-to-End Value Stream Map (VSM)
6. How to Read This Map
The map has three horizontal layers. Read them top to bottom.
Layer 1 — Information Flows (Top, Green Arrows)
This shows signals and instructions moving between Customer, Planning, and Supplier:
- The Customer sends a Monthly Forecast to Production Control.
- Production Control converts this into a Weekly Order sent to the Supplier.
- This information flow triggers the physical material flow below.
Layer 2 — Material Flows (Middle, Grey Process Boxes)
This shows the physical journey of materials and products from left to right:
| Process Box | What Happens | Classification |
|---|---|---|
| Manufacturing / Assembly | Raw materials are transformed into a product | 🟢 VA |
| Quality Check / Packaging | Product is inspected and prepared for shipment | 🟡 NNVA |
| Warehouse / Order Prep | Product is stored, staged and picked for delivery | 🟡 NNVA |
| Shipping / Delivery | Product is sent to the customer | 🟢 VA |
Yellow triangles between boxes = Waiting / Inventory. The numbers on each triangle (1783, 1202, 733, 593) represent the quantity of units sitting idle at that point. Idle inventory is a sign of waste — it represents tied-up capital and delay.
Layer 3 — Lead Time Ladder (Bottom, Orange Zigzag)
This is the most important section for waste analysis.
| Segment | Waiting Days | Processing Time | Meaning |
|---|---|---|---|
| Supplier → Manufacturing | 6 days | 300 sec | 6 days of material sitting before work starts |
| Manufacturing → Quality Check | 4 days | 45 sec | 4 days waiting in queue after production |
| Quality Check → Warehouse | 1 day | 300 sec | 1 day staging delay |
| Warehouse → Shipping | 3 days | 45 sec | 3 days order preparation wait |
How the total is calculated:
| Metric | Calculation | Result |
|---|---|---|
| Total Lead Time | 6 + 4 + 1 + 3 days | 14 days |
| Total Processing Time | 300 + 45 + 300 + 45 sec | 690 seconds ≈ 11.5 minutes |
| Value-Added Ratio | 11.5 min ÷ (14 days × 480 min/day) × 100 | ≈ 0.17% of total time |
Key Insight: The product spends 14 days travelling through the supply chain but is only being actively processed for less than 12 minutes. The remaining 99.8% of the time is waiting, queuing, or being stored. This is the definition of waste in Lean / BPM thinking.
7. What the Chart Below Tells You
The bar chart below translates this map into percentage terms — showing how total elapsed time is distributed across Value-Added, Necessary Non-Value-Added, and Waste categories.
Process Time Split — Based on 14-Day Lead Time Scenario
Example KPI View — Demo Data
DEBUG data: "[\n{ \"category\": \"Value-Added (VA)\", \"percentage\": 1 },\n{ \"category\": \"Needed Non-Value-Added (NNVA)\", \"percentage\": 21 },\n{ \"category\": \"Waiting / Waste (NVA)\", \"percentage\": 78 }\n]"
DEBUG parsedData: [
{
"category": "Value-Added (VA)",
"percentage": 1
},
{
"category": "Needed Non-Value-Added (NNVA)",
"percentage": 21
},
{
"category": "Waiting / Waste (NVA)",
"percentage": 78
}
]How the chart numbers are calculated:
| Category | Steps Included | Time | % of Lead Time |
|---|---|---|---|
| Value-Added (VA) | Manufacturing + Shipping processing time | ~300 sec total | ~1% |
| Needed Non-Value-Added (NNVA) | Quality Check + Warehouse processing time | ~390 sec + admin | ~21% |
| Waiting / Waste (NVA) | 6 + 4 + 1 + 3 days idle between steps | ~13.5 days | ~78% |
This chart is consistent with the map above. The 78% waste bar directly represents those yellow inventory triangles and the days shown on the Lead Time Ladder.
8. What This Means in BPM
By classifying steps, we can focus our improvement efforts:
- 🟢 Protect and optimize Value-Added steps — they are what the customer pays for.
- 🟡 Automate or simplify Necessary Non-Value-Added steps — reduce cost and time without removing the control.
- 🔴 Eliminate Waste — fix master data, reduce approvals, implement pull-based systems, improve scheduling.
9. Exercise
Review the process map above and answer:
- Which two steps are classified as Value-Added? What makes them VA?
- The inventory triangle between Manufacturing and Quality Check shows 1,202 units. What does this indicate?
- The total lead time is 14 days but processing time is 11.5 minutes. What percentage of time is the product actually being worked on?
- If you could eliminate the 4-day wait after Manufacturing, what would the new lead time be?
- Name one BPM tool or improvement that could reduce the waiting time shown on the Lead Time Ladder.
(Discuss with your team or write your answers before proceeding to the Order-to-Cash modules.)