Separating a mixed waste tally before any bar is drawn

Ask for the margin first

Sorting yards in eastern Bangkok often keep a fair weekly total and an unfair one. The fair total is what left the gate. The unfair one is the mixed line, used when plastic, organics, and residue were weighed together because the lane was blocked. If the studio draws the mixed line as if it were a material, the chart teaches the wrong lesson.

Before a bar is sketched, the studio asks for the handwritten split, even when it lives in a pencil margin. If the margin is missing for a week, that week stays unlabeled. A gap is easier to explain in a meeting than a colour that pretends the week was sorted.

Keep the unit the yard used

Some yards weigh in kilograms, then talk in sacks. The brief uses the unit on the scale ticket and mentions the sack only if the tally keeper can say what a sack held that month. A sack in the dry weeks and a sack in the rains are not the same object.

Organics that left for a pig farm, plastic that a trader collected, and residue that went to landfill are three departures. They can share a page. They do not share a bar.

What the meeting can say

Once the split is respected, a director can say which stream grew. They cannot say the yard became cleaner unless the same split was kept all year. The journal note the studio leaves with the yard is blunt about that limit, because the next quarter's tally keeper may be a different person with a different margin habit.

The families of counts behind notes like this are gathered in the indicator atlas.