Tag

data quality

Every clca article tagged “data quality” — 15 technical pieces covering the topic from methodology, standards interpretation and practical application angles.

15 articles

2026-08-2410 min readCBAM

Collecting CBAM data from suppliers: building a system that works

Without precursor data the declaration falls to defaults. The contractual, technical and operational ways to get data out of suppliers.

2026-08-1510 min readCBAM

CBAM default values or actual installation data?

Defaults are easy but expensive: by design they represent poor performance. What it costs to move to actual data, and what it returns.

2026-07-2111 min readPlatform

Monte Carlo uncertainty analysis in LCA: from the pedigree matrix to P10/P90

A single-number GWP result hides the uncertainty behind it. The chain from pedigree matrix to lognormal distribution to the P10/P90 band.

2026-06-2410 min read

Turning EPD data into a Scope 3 inventory

The EPDs you hold are the best data source for a corporate inventory — if you map the right modules to the right categories. Practical mapping rules.

2026-06-2211 min read

Collecting carbon data from the supply chain: running a programme that works

Sending a questionnaire is not collecting data. Segmentation, staged requests, template discipline and building supplier capability.

2026-06-1612 min read

Scope 3 Category 1: moving from spend-based to material-based

Purchased goods and services is most companies’ largest emission line — and usually their worst-measured one. A staged method for raising data quality.

2026-06-0811 min readData & Methods

LCI databases: choosing between ecoinvent, EF and sector datasets

Choosing a background database is not a technical detail but a methodological decision that changes the result. Coverage, system models and why you must not mix.

2026-06-0710 min readData & Methods

Primary and secondary data: which to collect for which line

Modelling everything with primary data is neither possible nor necessary. The foreground-background split and allocating a data collection budget well.

2026-06-0210 min readData & Methods

Sensitivity analysis: which assumption is actually carrying the result?

An LCA result is only as solid as its weakest assumption. One-at-a-time scans, hotspot analysis and how this differs from uncertainty.

2026-06-0110 min readISO Series

Cut-off rules: what you are allowed to leave out

No LCA models every flow. How cut-off criteria are defined, the mass-energy-environmental relevance triad, and the most common mistake.

2026-05-2710 min readGreen Building

BIM and LCA integration: from the model to embodied carbon

A BIM model already contains a bill of quantities. The real obstacle to connecting it to LCA is not software but material mapping.

2026-05-0310 min readFundamentals

What is a life cycle inventory (LCI)?

LCI is the phase where every flow in and out of the system is counted. An LCA’s quality is decided here — and so is most of its effort.

2026-04-2910 min readPlatform

How to choose LCA software: eight evaluation criteria

Comparing feature lists misleads. What actually decides it is database access, verifiability and fit with your workflow.

2026-04-2811 min readFundamentals

How is a carbon footprint calculated? Step by step

The calculation itself is a multiplication. The hard part is deciding what to multiply, and making the number defensible.

2026-04-279 min readFundamentals

What is an emission factor? Where to find one and how to choose

The multiplier in every carbon calculation. The source you pick moves the result noticeably, and the wrong factor is the most common calculation error.

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