Shop-floor control is how the plan becomes visible work and how completed work becomes usable data.
The minimum viable transaction set
Every additional transaction you ask operators to perform must earn its place. In most small plants the essential set is small: material issue, operation completion, quantity good and scrap, and job close.
Ask what decision each data point supports. If nobody uses it, stop collecting it.
Travelers and routings
Routings define the operations, sequence, work centers and standards. Travelers put that on paper or a screen at the job. Keeping them in sync with reality — including the informal steps the floor added years ago — is what makes scheduling credible.
Barcode and mobile capture
Scanning reduces error and delay, but it amplifies whatever process it automates. Fix the transaction design first; then automate the capture.