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Procurement Glossary
Material Classes: Systematic Categorization for Strategic Procurement
March 30, 2026
Material classes form the foundation of a structured procurement strategy and enable the systematic categorization of goods according to various criteria. This classification helps purchasing organizations develop specific procurement strategies and allocate resources optimally. Below, learn what material classes are, which classification methods exist, and how to use them strategically in procurement.
Key Facts
- Material classes structure the entire procurement portfolio according to strategic considerations
- Classic categories include A, B, and C materials as well as strategic, leverage, bottleneck, and non-critical materials
- Classification is based on criteria such as procurement volume, market risk, and security of supply
- Each material class requires specific procurement strategies and supplier management approaches
- Digital tools now enable automated and data-driven classification
Content
Definition: Material Classes
Material classes are systematic categorizations of procurement objects that enable strategic procurement management.
Basic Classification Approaches
ABC analysis is the classic approach to material classification. Materials are categorized according to their share of the total procurement volume:
- A materials: 70-80% of procurement value with 10-20% of items
- B materials: 15-25% of value with 20-30% of items
- C materials: 5-10% of value with 50-70% of items
Material Classes vs. Material Groups
While Commodity Groups primarily differentiate based on functional or technical characteristics, material classes focus on strategic procurement aspects. Materials Management uses both approaches complementarily for holistic management.
Importance of Material Classes in Procurement
Material classes enable a differentiated Procurement Strategy and optimize the use of resources. They form the basis for strategic decisions in supplier selection and contract design.
Methods and Approaches
Materials are classified using various proven methods that can be combined depending on the company's strategy.
Kraljic Portfolio Matrix
This method classifies materials based on two dimensions: procurement volume and supply risk. This results in four strategic material classes:
- Strategic materials: High value, high risk
- Leverage materials: High value, low risk
- Bottleneck materials: Low value, high risk
- Non-critical materials: Low value, low risk
Multi-Criteria Analysis
Modern approaches take additional factors into account, such as technology complexity, supplier availability, and sustainability aspects. Needs Analysis provides important baseline data for classification.
Data-Driven Classification
Digital systems enable continuous reassessment based on current market data and consumption patterns. Market Analysis supports the dynamic adjustment of classification.
KPIs for Managing Material Classes
Effective KPIs enable the continuous monitoring and optimization of material classification.
Classification Accuracy
The accuracy rate of classification is measured by the proportion of correctly assigned materials. This KPI should be reviewed regularly and corrected in the event of deviations:
- Target value: >95% correct classification
- Measurement interval: Quarterly review
- Corrective actions in case of underperformance
Strategy Compliance by Material Class
The share of procurement activities that comply with the defined class strategy indicates the quality of implementation. High Procurement Policy Compliance is crucial for success.
Cost Efficiency per Material Class
The development of procurement costs per material class over time shows the effectiveness of class-specific strategies. Procurement Benchmarking supports performance evaluation.
Risk Factors and Controls for Material Classes
Insufficient or outdated material classification can lead to suboptimal procurement decisions and increased costs.
Misclassification and Consequences
Incorrect classifications lead to inadequate procurement strategies and can cause both oversupply and undersupply. Regular reviews of classification are therefore essential for effective Supply Assurance.
Static Classification Models
Outdated classifications do not take market changes or new risk factors into account. Continuous Market Monitoring is necessary to ensure that material classes remain up to date.
Complexity Risks
Overly detailed classification systems can make operational handling more difficult and lead to inefficiencies. A balanced relationship between level of detail and practical applicability is crucial to the success of the Procurement Organization.
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Practical Example
An automotive supplier reclassifies its 15,000 procurement items: electronic components (A material, strategic) receive intensive supplier partnerships, standard screws (C material, non-critical) are procured automatically via e-catalogs. Special alloys are identified as bottleneck materials and secured through dual sourcing. The result: 12% cost savings and 30% fewer delivery failures within one year.
- Systematic reassessment of all materials using the Kraljic matrix
- Development of class-specific procurement strategies
- Implementation of automated procurement processes for C materials
Current Developments and Impact
The classification of materials is continuously evolving due to technological innovations and changing market conditions.
AI-Supported Classification
Artificial intelligence is revolutionizing material classification through automated pattern recognition and predictive analytics. AI in Procurement enables dynamic adjustment of classification based on real-time data and market changes.
Sustainability Criteria
ESG factors (Environmental, Social, Governance) are increasingly being integrated into material classification. The Supply Chain Due Diligence Act is reinforcing this trend and making sustainability aspects a strategic classification criterion.
Supply Chain Resilience
Geopolitical uncertainties and supply chain disruptions are leading to a reassessment of traditional classification approaches. Supply Chain Resilience Management is becoming a key criterion for material classification.
Conclusion
Material classes are an indispensable tool for strategic procurement management and enable a differentiated approach to various procurement objects. Continuous development through digital technologies and the integration of sustainability criteria make them a dynamic management tool. Successful companies use material classes as a basis for data-driven decisions and thereby sustainably optimize both costs and security of supply.
FAQ
How often should material classes be reviewed?
An annual basic review is recommended; in volatile markets or for strategic materials, quarterly reviews are also advisable. Automated systems can enable continuous monitoring and adjustments in order to respond promptly to market changes.
Which criteria are most important for classification?
Procurement volume, supply risk, and strategic importance form the foundation. In addition, sustainability aspects, technology complexity, and supplier availability are becoming increasingly important for future-oriented classification.
How many material classes are optimal?
Four to six main classes have proven effective in practice, as they provide sufficient differentiation while keeping complexity manageable. Too many classes make operational implementation more difficult, while too few reduce strategic control options.
What are typical mistakes in material classification?
Common mistakes include focusing exclusively on volume, neglecting market risks, and using static classifications without regular updates. Insufficient coordination between procurement and specialist departments also often leads to suboptimal results.
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