Metrics Log

The Metrics Log records numeric environmental readings over time — water consumption, waste generated, energy usage, and air-quality monitoring — each entry a single measurement for a named metric, period, value and unit.

Environmental performance is inherently a trend, not a point-in-time fact — whether water consumption is improving or worsening only means something measured against previous periods. Storing every reading as its own record, rather than overwriting a single "current value" field, is what makes that trend visible later.

Each entry is tagged with a category (Water consumption, Waste generated, Energy usage, or Air quality monitoring), a specific metric name (free text, so an organisation can track whatever it actually measures within a category), a period, a numeric value, and a unit.

The list page shows every reading with its category and period, filterable and sortable by period or category. The detail page shows the full entry; create and edit forms share the same fields.

• Category — required. One of Water consumption, Waste generated, Energy usage, Air quality monitoring.
• Metric name — required. What specifically is being measured (e.g. "Site potable water" or "Diesel generator run-hours").
• Period — required. The period this reading is for.
• Value — required, numeric, cannot be negative.
• Unit — required. The unit the value is expressed in (e.g. "kL", "kWh", "tonnes").

Creating or editing a reading validates category, metric name, period and unit as required, and value as a non-negative number.

There's no automated trend chart, alert threshold, or rollup computed from these readings in the current version of the product — the log is the record itself. Findings in the Compliance Register that relate to a metric here (e.g. a water-usage limit) are recorded separately; relate them manually if useful.

Can "value" be a rate rather than a total? Yes — the field is just a number with a unit you choose; whether it represents a total, an average, or a rate for the period is a convention your organisation sets and should keep consistent within each metric name.