SPD-200: Assessment Methodology & Indicator Structure Guideline is the core technical methodology document of the Sustainable Product Declaration system developed by United Metric Association. While SPD-100 establishes the overall philosophy, principles, scope and system architecture of SPD, SPD-200 defines how product sustainability information is assessed, structured, interpreted and prepared for review within the SPD framework. It translates the general principles of product-level sustainability transparency into a practical methodology for data collection, lifecycle boundary definition, indicator selection, evidence grading and assessment consistency.

SPD-200 is designed to support manufacturers, assessors, reviewers, consultants and technical teams in preparing credible, evidence-based and reviewable product sustainability declarations. It provides the methodological foundation for organizing product data, production information, environmental indicators, lifecycle-related aspects, selected ESG indicators and supporting evidence in a structured and technically consistent format.

The guideline defines the logic for applying lifecycle-informed assessment without automatically implying that every SPD is a full cradle-to-grave Life Cycle Assessment or a Type III Environmental Product Declaration. For many construction and industrial products, SPD-200 supports a practical cradle-to-gate approach as a starting boundary, while allowing downstream considerations such as transport, installation, use phase, maintenance, service life, reuse, recycling and end-of-life where these aspects are relevant and supported by evidence.

A central function of SPD-200 is to define the indicator structure of the SPD system. This includes environmental indicators, lifecycle-related indicators, documentation indicators, selected ESG indicators, data quality indicators and improvement-oriented indicators. The document explains how indicators should be selected, defined, supported by evidence and interpreted within the declared product scope and assessment boundary.

SPD-200 also establishes the methodological rules for data hierarchy and data quality. It distinguishes between primary data, supplier data, secondary data, estimated data and proxy data, and clarifies how each type of data should be used and disclosed. This helps prevent weak or generic data from being presented as product-specific measured information and supports transparent communication of assumptions, limitations and uncertainty.

The guideline is particularly important for maintaining consistency across different product categories. It provides general assessment rules that are later adapted through SPD-PCG Product Category Guidance Documents, which define product-specific requirements, declared units, functional units where relevant, lifecycle boundaries, data needs, evidence expectations and hotspot considerations. This ensures that products such as cement, steel, tiles, insulation materials, coatings, pipes, lighting products or composite systems can be assessed through a common SPD logic while still reflecting their specific technical characteristics.

SPD-200 also supports the anti-greenwashing purpose of the SPD system. By requiring clear boundaries, traceable data, defined indicators, evidence grading and transparent limitations, the methodology helps ensure that SPD outputs do not become vague marketing claims. Product sustainability information must remain specific, evidence-based, scope-limited and suitable for review.

Overall, SPD-200 provides the technical backbone of the Sustainable Product Declaration system. It enables product sustainability information to be transformed from scattered data and general claims into structured, traceable and reviewable assessment outputs. Its value lies in creating methodological consistency, strengthening evidence quality, supporting lifecycle-informed decision-making, enabling product category adaptation and preparing declarations for verification, reporting, registry publication and responsible market communication.
The full SPD-200 Guideline is available for download exclusively by United Metric members.