10.1 Customer Identification: Internal vs. External Stakeholders

10.1 Customer Identification: Internal vs. External Stakeholders

In traditional commercial models, the term customer was restricted exclusively to the external individual or business purchasing a finished product or paying for a service. Total Quality Management (TQM) revolutionized this perspective. Under the frameworks established by Joseph Juran, W. Edwards Deming, and Kaoru Ishikawa, a customer is recognized as anyone who receives or is impacted by the output of a process.

On the ASQ Certified Quality Improvement Associate (CQIA) examination, quality professionals must be able to identify internal and external customers, map stakeholder relationships across complex value streams, apply Ishikawa's customer principle, and prioritize competing stakeholder requirements.

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1. The Total Quality Perspective on Customers & Value Chains

In a mature Quality Management System (QMS), an organization is not viewed as a collection of isolated, competing fiefdoms. Instead, it is understood as an interconnected network of customer-supplier relationships extending from raw material vendors, through internal operations, to the end consumer.

+-------------------------------------------------------------------------+
|                 THE EXTENDED CUSTOMER-SUPPLIER CHAIN                    |
+-------------------------------------------------------------------------+
|                                                                         |
|  [ Upstream ] ──► [ Process A ] ──► [ Process B ] ──► [ Downstream ]    |
|   Suppliers         (Machining)       (Finishing)       Assembly        |
|       │                  │                 │                │           |
|       └──────────────────┼─────────────────┼────────────────┘           |
|                          ▼                 ▼                            |
|               INTERNAL CUSTOMER HANDOFFS (Ishikawa)                     |
|             * Next workstation is the internal customer                 |
|             * Zero defects passed downstream                            |
|                                                                         |
|                                  │                                      |
|                                  ▼                                      |
|                       [ Finished Product ]                              |
|                                  │                                      |
|         ┌────────────────────────┼────────────────────────┐             |
|         ▼                        ▼                        ▼             |
|   [ Wholesale/OEM ]       [ End Consumer ]        [ Regulators ]        |
|   Intermediate Buyer      Ultimate User           FDA / FAA / OSHA      |
|                                                                         |
+-------------------------------------------------------------------------+

Joseph Juran formulated the Triple Role Concept (the TRIP model), establishing that every operational worker, team, and department simultaneously performs three functions:

1. Supplier: Producing outputs and handing them to the next process.
2. Processor: Transforming incoming inputs into value-added outputs.
3. Customer: Receiving inputs from an upstream process.

+-------------------------------------------------------------------------+
|                     JURAN'S TRIPLE ROLE (TRIP) MODEL                    |
+-------------------------------------------------------------------------+
|                                                                         |
|   ┌──────────────┐       ┌──────────────┐       ┌──────────────┐        |
|   │   CUSTOMER   │ ────► │  PROCESSOR   │ ────► │   SUPPLIER   │        |
|   │              │       │              │       │              │        |
|   │ Receives     │       │ Transforms   │       │ Delivers     │        |
|   │ inputs &     │       │ inputs via   │       │ outputs to   │        |
|   │ requirements │       │ value-added  │       │ next process │        |
|   │ from upstream│       │ operations   │       │ downstream   │        |
|   └──────────────┘       └──────────────┘       └──────────────┘        |
|                                                                         |
+-------------------------------------------------------------------------+

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2. Internal Customers & Ishikawa's Foundational Maxim

Definition of Internal Customers

An internal customer is any individual, work cell, downstream process, or department within the same organization that relies on the output of a preceding worker or department to execute their job. Outputs can include physical components, raw materials, engineering drawings, laboratory test data, invoices, payroll checks, or software code.

Kaoru Ishikawa's Maxim: "The Next Process Is Your Customer"

In the early development of Japanese Quality Control Circles, Dr. Kaoru Ishikawa observed that traditional organizations suffered from chronic interdepartmental conflict and silo mentalities. Workers focused strictly on satisfying their direct supervisor or meeting daily unit production quotas, with total disregard for the defect rate or usability of parts handed off to the next station.

Ishikawa introduced the revolutionary doctrine:

"The next process is your customer" (後工程はお客様 - Kōtei wa kyaku).

This simple maxim fundamentally reshaped industrial quality by establishing three operational rules:

1. Never accept defective inputs from an upstream process without reporting and correcting the deviation.
2. Never create defects within your own process through careless execution or non-adherence to standard work.
3. Never pass defective outputs to the next downstream process.

Common Internal Customer Relationships

Service Level Agreements (SLAs) for Internal Quality

To prevent ambiguity, mature organizations establish Internal Service Level Agreements (SLAs) or Operational Level Agreements (OLAs). These documents define exact specifications, delivery turnaround times, acceptable quality thresholds, and communication protocols between internal departments, ensuring internal customer satisfaction is measured with the same rigor as external client relationships.

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3. External Customers & Stakeholder Taxonomy

An external customer is any individual, enterprise, or institution outside the boundaries of the producing organization that is impacted by the organization's products, services, or activities. External stakeholders are categorized across distinct operational tiers.

+-------------------------------------------------------------------------+
|                     EXTERNAL STAKEHOLDER TAXONOMY                       |
+-------------------------------------------------------------------------+
|                                                                         |
|  1. END USERS / ULTIMATE CONSUMERS                                      |
|     * Actually operate, consume, or experience the product/service      |
|     * Primary focus: Usability, reliability, performance, safety        |
|                                                                         |
|  2. INTERMEDIATE PURCHASERS / BUSINESS-TO-BUSINESS (B2B)                |
|     * Wholesalers, Distributors, Retailers, OEMs, Value-Added Resellers |
|     * Primary focus: Packaging, profit margins, on-time delivery, EDI   |
|                                                                         |
|  3. REGULATORY AGENCIES & STANDARDS BODIES                              |
|     * FDA, FAA, EPA, OSHA, ISO, state licensing boards                 |
|     * Primary focus: Statutory compliance, traceability, safety limits  |
|                                                                         |
|  4. COMMUNITY, SOCIETY & INVESTORS                                      |
|     * Local municipality, environmental advocates, shareholders         |
|     * Primary focus: Emissions, ethical conduct, financial stability    |
|                                                                         |
+-------------------------------------------------------------------------+

Detailed Categories of External Stakeholders

1. End Users (Ultimate Consumers)

• Role: The specific human beings who physically use, wear, consume, or interact with the product or service.
• Quality Focus: Ease of use, ergonomics, aesthetic appeal, long-term reliability, clear instruction manuals, and customer support.
• Example: In medical device manufacturing, the patient receiving a pacemaker and the surgeon implanting it are both key end users.

2. Intermediate Purchasers (B2B & Distribution Channels)

• Role: Commercial entities that purchase products not for personal consumption, but for resale, distribution, or integration into higher-level assemblies.
• Categories:
  • Wholesalers and Distributors: Demand standardized pallet dimensions, barcoding compliance, reliable order fulfillment, and bulk freight discounts.
  • Retailers: Demand shelf-ready packaging, consistent lead times, point-of-sale promotional support, and rapid return processing.
  • Original Equipment Manufacturers (OEMs): Incorporate the product as a component into their own finished goods (e.g., an automotive automaker buying tires from Michelin).

3. Regulatory Authorities & Standards Bodies

• Role: Government agencies and independent auditing bodies that enforce statutory safety, health, environmental, and financial compliance.
• Quality Focus: Conformance to legal statutes (e.g., FDA 21 CFR Part 820 / ISO 13485 for medical devices, FAA Part 21 for aerospace, EPA emissions caps, OSHA workplace safety).
• Note: While regulatory agencies do not pay for products, they possess the statutory authority to halt operations, issue recalls, or impose severe financial penalties, making them non-negotiable external stakeholders.

4. The Community & General Public

• Role: Neighbors residing near manufacturing plants, municipal authorities, environmental organizations, and society at large.
• Quality Focus: Effluent water purity, airborne emissions, noise pollution, traffic congestion, ethical labor practices, and sustainable corporate citizenship.

Operational Comparison: Internal vs. External Customers

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4. Stakeholder Mapping & Prioritization: The Power-Interest Matrix

Because different customer groups frequently present contradictory requirements (e.g., end users demanding lower weight while regulators mandate heavy crash-reinforcement structures), organizations utilize structured stakeholder analysis tools.

Mendelow's Power-Interest Matrix plots stakeholders along two critical dimensions:

• Power (Influence): The stakeholder's capacity to dictate terms, allocate resources, or halt organizational operations.
• Interest (Impact): The degree to which the stakeholder is affected by or actively concerned with the project's decisions and outcomes.

+-------------------------------------------------------------------------+
|                    MENDELOW'S POWER-INTEREST MATRIX                     |
+-------------------------------------------------------------------------+
|     High                                                                |
|       ▲                                                                 |
|       │   [ KEEP SATISFIED ]            │   [ MANAGE CLOSELY ]          |
|       │   * High Power, Low Interest    │   * High Power, High Interest |
|       │   * Satisfy regulatory rules    │   * Key customers & sponsors  |
|       │   * Executive steering committee│   * Major tier-1 B2B buyers   |
|       │   ──────────────────────────────┼─────────────────────────────  |
|   P   │   [ MONITOR ]                   │   [ KEEP INFORMED ]           |
|   O   │   * Low Power, Low Interest     │   * Low Power, High Interest  |
|   W   │   * Minimum resource allocation │   * Community groups          |
|   E   │   * Passive information tracking│   * Internal staff / operators|
|   R   │   * General public              │   * User groups / beta testers|
|       │                                 │                               |
|       └─────────────────────────────────┴─────────────────────────────► |
|      Low                                                           High |
|                               INTEREST                                  |
+-------------------------------------------------------------------------+

Strategic Engagement Quadrants

1. High Power, High Interest (Manage Closely — Key Players):
   • Major commercial clients, key regulatory inspectors, primary project sponsors, and core product end users.
   • Strategy: Engage proactively through dedicated account teams, continuous VOC sessions, steering committees, and collaborative co-design.
2. High Power, Low Interest (Keep Satisfied):
   • Corporate legal counsel, external financial auditors, high-level institutional investors, and broad statutory oversight bodies.
   • Strategy: Ensure strict compliance with all requirements and provide tailored high-level briefings without overwhelming them with operational trivia.
3. Low Power, High Interest (Keep Informed):
   • Line-level operators, internal support staff, local neighborhood associations, and end-user enthusiast communities.
   • Strategy: Maintain open communication channels, regular newsletters, Gemba walks, and feedback forums to prevent resentment and harness grassroots improvement ideas.
4. Low Power, Low Interest (Monitor):
   • Peripheral vendor suppliers, general public, casual industry observers.
   • Strategy: Monitor via standard automated channels with minimal expenditure of project resources.