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MEASURED QUANTITY SENSITIVITY

Lumber purchase list — purchased board length scenarios.

How does changing purchased board length affect lumber purchase list when the other inputs stay fixed?

What this decision changes

This measured quantity or supplied dimension enters the method on its stated unit basis. Other inputs stay fixed so its effect can be separated from net deductions, stock constraints or purchase rounding. Method basis: Each stock item gets its own whole-board allowance. The volume is summed after rounding each item. Different sizes stay visible as separate lines.

The focus is purchased board length in the first repeated measured entry. Other repeated entries keep their own supplied values.

Volume = Σ(purchased count × L × W × T)Lumber Purchase List Calculator

Evaluate your supplied alternatives

Start with your measured plan and selected product data. The initial values and range are illustrative. Each scenario changes only purchased board length in the first repeated entry; the other entered values stay fixed.

Display units

Measured plan and product inputs

Waste allowance

%

Shortcuts only; choose your own allowance above.

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

Stock item 1 · entry varied by the range

Purchased board length

m

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Actual width

mm

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Actual thickness

mm

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Boards needed

Stock item 2

Purchased board length

m

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Actual width

mm

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Actual thickness

mm

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Boards needed

Supplied comparison range for purchased board length

Lower supplied comparison value

m

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Upper supplied comparison value

m

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Nine evenly spaced values are evaluated. Whole counts are rounded to distinct integer scenarios. Values between the listed samples are not calculated.

9 evaluated scenarios

Baseline: Purchased lumber volume — 0.188 m³. Rejected combinations remain visible below.

Quantity to plot

Each bar is one actual calculated purchased lumber volume. Horizontal values: purchased board length in m. Only the first repeated entry varies.

Purchased board length	Purchased lumber volume	Change from baseline	Use this scenario
1.2 m	0.1704 m³	-0.0176 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 72.21143 board ft
1.45 m	0.1759 m³	-0.0121 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 74.5422 board ft
1.7 m	0.1814 m³	-0.0066 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 76.87297 board ft
1.95 m	0.1869 m³	-0.0011 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 79.20373 board ft
2.2 m	0.1924 m³	0.0044 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 81.5345 board ft
2.45 m	0.1979 m³	0.0099 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 83.86527 board ft
2.7 m	0.2034 m³	0.0154 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 86.19604 board ft
2.95 m	0.2089 m³	0.0209 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 88.52681 board ft
3.2 m	0.2144 m³	0.0264 m³	Open in calculator Exact quantity breakdown Item 1 boards 11 boards Item 2 boards 6 boards Board-foot volume 90.85757 board ft

Read the evaluated results

Read calculated demand, whole purchases and exact detail lines separately. This specific input may change quantity continuously, cross a purchase step or make the stated geometry or stock fit invalid.

Replace every illustrative baseline measurement and selected product value with the inputs for your actual task.
Enter a comparison range on the focused input's stated unit and quantity basis.
Review rejected combinations and use the exact detail lines to distinguish measured demand from whole purchases.
Open an evaluated scenario in the full calculator to save its original inputs and quantity breakdown to a browser material project.

Keep the comparison within scope

Compare measurements or already specified alternatives. Quantity sensitivity does not establish material suitability or construction requirements.

Uses supplied geometry, product properties and purchasing specifications.

Does not choose or certify construction dimensions, spacing, loads or regulatory requirements.

Only the listed samples are evaluated. Intermediate values, alternate constraints and global cutting optimality are not inferred from the graph.

Continue with this quantity method

Lumber Purchase List Calculator

Other independent input decisions

Prepare the actual material data

Read the measurement and purchase guides

Check actual dimensions before treating board feet as physical timber volume

Quantity method and illustrative scenarios checked 6 October 2026. Methods and scope.