Material flow analysis
Material flow analysis (MFA) is a systematic method for quantifying stocks and flows of materials within a defined system, boundary, and period. It records where materials enter, move, accumulate, and leave, using mass-balance relationships to reveal how an economy, sector, process, or product system uses resources.
In simple terms
An analyst first defines the system and accounting period, then compiles quantities for extraction or inputs, imports, exports, outputs, emissions, waste, and changes in stock. Economy-wide material flow accounts commonly report tonnes per year and derive indicators such as domestic material consumption: domestic extraction plus imports minus exports. Material flow analysis describes physical movement; a Material footprint attributes upstream material extraction to final demand, including extraction embodied in trade.
Why it matters
MFA makes the physical scale and direction of resource use visible. It can identify losses, accumulation, import dependence, and opportunities for Recycling or Circular economy strategies. Clear boundaries and consistent units are essential, because changing what is included can alter apparent efficiency and prevent valid comparison across places, products, or years.
Example
A region records construction minerals, biomass, metals, and fossil materials entering during one year, then reconciles products, exports, emissions, waste, and additions to buildings and infrastructure. The resulting balance shows which flows dominate and where Recycled content could reduce demand. It does not by itself provide a full Life cycle assessment.