2.4.1 Capability Analysis

Capability Analysis Adapted to SDG 9: Industry, Innovation, and Infrastructure1. What is Process Capability in the Context of SDG 9?
Process capability under SDG 9 is not just about meeting product specifications — it is about ensuring sustainable, innovative, and resilient industrial processes.

• Definition: Process capability measures how well an industrial or infrastructure process can produce outputs that meet technical specifications while also aligning with sustainability and innovation goals.
• For example, in green manufacturing, capability indices evaluate whether processes can meet both quality tolerances and environmental performance metrics (e.g., reduced emissions, energy efficiency, circular economy practices).

Indices used in SDG 9 context: Cp, Cpk, Pp, Ppk, and Cpm.

• Cp = assesses the potential of an industrial process to operate within sustainable design limits.
• Cpk = shows whether the process is centered not only on quality specifications but also on target sustainability outcomes (e.g., energy use per unit).
• Cpm = incorporates deviation from target goals, such as reducing CO₂ per unit of production.

2. Sources of Variation in Sustainable IndustryVariation in processes directly affects infrastructure resilience and industrial sustainability.

• Common causes of variation in SDG 9 industries:
  • Normal wear of eco-efficient machinery
  • Fluctuations in renewable energy supply
  • Material variability in recycled inputs
• Special causes of variation:
  • Supply chain disruptions due to climate events
  • Machine failures that compromise safety
  • Political or regulatory changes affecting industrial innovation standards

Managing these ensures that industrial systems remain resilient and sustainable, supporting SDG 9 targets.

3. SPC and Monitoring for SDG 9Statistical Process Control (SPC) techniques (e.g., control charts, histograms, probability plots) ensure that processes remain stable, resilient, and environmentally responsible.

• Control charts: Help identify when industrial emissions, waste, or defects drift beyond acceptable sustainable thresholds.
• Histograms and normality testing: Ensure that resource usage per unit (like water or electricity) remains normally distributed and predictable.
• Probability plots: Estimate long-term sustainability yields, such as the likelihood of producing 100% recyclable products.

By applying SPC, industries contribute to sustainable industrialization and global competitiveness, as envisioned by SDG 9.

4. Estimating Process Capability for Sustainable InfrastructureProcess capability requires determining mean and standard deviation of critical-to-quality (CTQ) variables. Under SDG 9, CTQs extend beyond product dimensions to include sustainability indicators, such as:

• Energy consumption per unit produced
• Carbon emissions per ton of material
• Safety margins in infrastructure durability

Formulas Applied to SDG 9

• Cp = (USL − LSL) / 6σ
  • USL and LSL represent sustainable tolerance limits (e.g., maximum allowed CO₂ vs. minimum energy efficiency).
  • σ represents process variability in sustainable performance.
  • A Cp > 1.33 shows the process is capable of meeting both quality and sustainability benchmarks.
• Cpk = min((x̄ − LSL) / 3σ, (USL − x̄) / 3σ)
  • Evaluates whether the process is not only capable but also aligned with sustainability targets.
  • Example: A process may meet dimensional tolerances (Cp high) but if it drifts away from energy efficiency goals, its Cpk will be low.
• Cpm
  • Focuses on deviation from the sustainable target value, such as ideal renewable energy usage.

5. Capability Analysis in Practice for SDG 9Industries and infrastructure projects can use capability analysis to:

1. Predict Sustainable Performance – e.g., predict how well a concrete plant meets low-carbon cement specifications.
2. Assist in Innovation – guide R&D in designing eco-friendly manufacturing processes.
3. Support Resilient Infrastructure – ensure safety margins in bridges, buildings, and transport systems.
4. Improve Supply Chains – select suppliers based on long-term Cpk/Ppk values, ensuring sustainable sourcing.
5. Optimize Equipment Investments – establish capability requirements for new green technologies.

6. Broader Role of Capability Analysis in SDG 9

Capability analysis contributes to the three pillars of SDG 9:

• Industry: Ensures competitive, resource-efficient production with fewer defects and reduced environmental impact.
• Innovation: Uses indices like Cpm to track alignment with innovative targets such as net-zero goals or circular economy practices.
• Infrastructure: Provides quantitative evidence that bridges, energy grids, and transport systems meet both quality standards and sustainability thresholds.

7. Example – Applying Cpk in Sustainable Manufacturing

A solar panel manufacturer specifies:

• LSL = 18% efficiency
• USL = 24% efficiency
• Mean panel efficiency (x̄) = 20%
• σ = 1%

Cpk = min((20 − 18) / 3(1), (24 − 20) / 3(1)) = min(0.67, 1.33) = 0.67

Interpretation: While Cp might indicate the process has potential, Cpk reveals that production is not well-centered — many panels fall below the sustainable target efficiency. The company must innovate (e.g., through R&D in materials) to align with SDG 9 objectives.

8. Key Takeaway
Capability analysis is no longer only a quality tool; in the SDG 9 context, it is a strategic enabler for sustainable industrialization.It ensures that industrial processes and infrastructure projects are:

• Resilient against disruptions and variations
• Innovative in meeting new environmental and technical targets
• Sustainable by reducing waste, emissions, and inefficiencies
• Globally competitive by aligning with international standards and customer expectations