An indicator measures a condition; a target states the improvement sought by a given time.
The Sustainable Development Goals, or SDGs, link economic growth, environmental protection and social inclusion. Growth can expand jobs and public revenue. Protection maintains the ecosystems that support livelihoods. Inclusion means that people who face barriers can share in opportunities and services. Progress in one area does not guarantee progress in the others.
A quantitative indicator is a numerical measure. Real GDP per person can track average economic output, the proportion of wastewater safely treated can track an environmental pressure, and the proportion of people using safely managed drinking-water services can track access to an essential service. Each answers a different question.
A target adds an intended outcome and deadline. An invented local plan might aim for real output per person to grow by 2% each year, safely treated wastewater to rise from 40% to 70% in five years, and safely managed drinking-water access to reach 95% of residents by then. These are illustrative economic, environmental and inclusion targets, not official SDG target values. The percentage safely treated is an indicator; 70% by the deadline is its target.
Compare the same definition, area and time period. An average may improve while poorer neighbourhoods fall behind. Break figures down by location or social group where possible. Countries with limited survey funding, trained staff or registration systems may lack reliable observations. Missing data mean uncertainty, not proof that nothing improved.
Step by step
Choose a measure
Match the indicator to the specific economic, environmental or inclusion goal.
Define the comparison
State units, baseline, deadline and who is included.
Check coverage
Ask whether missing or averaged data hide people and places.
Worked example: Progress is not completion
In an invented town, safe wastewater treatment rises from 40% to 55%, against a target of 70%. It improves by 15 percentage points and remains 15 points short. A separate access survey is needed to know which neighbourhoods benefit.
Watch out for this
A rise from 40% to 55% is a rise of 15%.
It is 15 percentage points. Relative to the starting value it is a 37.5% increase: 15 / 40 x 100.
Check your understanding
A country lacks recent household survey data. Which conclusion is justified?
- Its progress is harder to measure reliably, especially for groups absent from other records.
- Economic growth figures can replace every missing social indicator.
- It has made no social progress.