What you will learn
- What a sawmill does, from log yard to graded boards
- How log intake, sawing, drying and grading are tracked
- How recovery and grade outturn are measured
- How orders drive the cutting plan
- Where mill production ends and timber sales begin
What this project is
A sawmill turns logs into boards, and the transformation is where value is made or lost. Logs arrive by species, size and grade. They are sawn to dimensions, dried, graded and sorted, then sold against orders. A production system tracks that flow: logs in, boards out, by dimension and grade, with recovery measured as the proportion of log volume that becomes saleable product. Without that tracking, the mill knows what it sold but not what it wasted, and cannot tell whether a poor week was due to poor logs, poor sawing or poor orders.
Recovery and grade outturn are the key measures. Recovery shows how efficiently logs are converted; grade outturn shows the quality mix of the boards produced. Both vary with log quality, sawing pattern and operator decisions. The system should record them by log batch, sawing pattern and shift, so a drop in recovery can be traced to its cause rather than blamed generally on the logs. Order fulfilment is the other half: the cutting plan should be driven by open orders, so the mill cuts what is sold, not what is convenient.
Core features
- Log intake recording by species, size, grade and supplier, linked to chain of custody where used
- Sawing records by batch, pattern and shift, with boards produced by dimension
- Drying tracking by batch, with schedules and moisture results
- Grading and sorting records by dimension and grade, with stock by product
- Recovery and grade outturn reporting by batch, pattern, shift and log source
- Order-driven cutting plans, showing what to cut against open orders
How it is built
- Map the mill flow first: yard, saw line, drying, grading and dispatch, with the data captured at each stage
- Build log intake and sawing records, then grading and stock
- Add drying tracking, then recovery and outturn reporting
- Add order-driven cutting plans, then reporting for mill management
- Pilot on one saw line for a month, comparing system recovery figures with manual counts
Technology considerations
Data capture on a saw line is fast and dusty. The system should capture counts and dimensions with minimal manual entry, using scanners, counters or machine data where available, and simple entry where not. Batch identity must survive the mill: a batch of boards must be traceable to the log batch it came from, or recovery cannot be calculated. That identity is often lost at drying, where batches are mixed, so the system needs a practical rule for batch handling at each stage, agreed with mill staff rather than imposed by software.
Order integration matters. If the cutting plan is built from orders, the mill cuts to demand; if it is built from habit, stock piles up in dimensions nobody ordered. The system should show open orders by dimension and grade alongside stock, so the cutting decision is visible. Moisture and drying data need care too: a board's grade and value depend on proper drying, and the system should record drying schedules and results by batch, not just by date.
For the first version, run one saw line for a month: log intake, sawing by batch and pattern, grading, stock, and recovery with grade outturn, compared against manual counts. Mill managers judge the system on whether recovery can be traced to batch, pattern and shift. A system that does that for one line, with batch identity surviving drying, is ready to cover the whole mill.
Challenges to plan for
- Batch identity lost at drying, making recovery calculation impossible
- Recovery figures that cannot be traced to a cause, because batch, pattern and shift were not recorded together
- Cutting plans that ignore orders, producing stock in dimensions nobody wants
- Log intake data that does not match supplier records, creating disputes
Who it is for, and its limits
This suits a sawmill operator, a timber processor or a forestry company with its own mill. It fits mills where log costs and recovery drive profitability. It does not fit a small portable sawmill with occasional work, and it is not a sales system: it tracks production to the point of graded stock, sales follow from stock and orders.
A production system does not improve recovery by itself. Recovery improves when the mill can see where volume is lost and act on it. Costs vary with mill size and automation level, so confirm with a quote after the mill flow is mapped.
Frequently asked questions
What is recovery?
The proportion of log volume that becomes saleable boards. Higher recovery means less waste and more product from the same logs. It is measured by comparing log volume in with board volume out, by batch.
What is grade outturn?
The mix of grades in the boards produced from a batch. A batch that produces mostly high-grade boards is worth more than one producing mostly low-grade boards, even at the same recovery.
How are orders used in cutting?
Open orders by dimension and grade drive the cutting plan, so the mill cuts what customers have ordered. Stock on hand is checked against orders before new cutting is planned.
Why does batch identity matter?
Because recovery and grade can only be calculated for a batch if boards can be traced back to the logs they came from. Lose the batch link and the figures become mill-wide averages that explain nothing.
Does the system handle drying?
Yes, by batch: drying schedules, moisture results and drying time. Proper drying affects grade and value, so it is tracked as part of production, not as a separate afterthought.