Target Troubles

1. If I want to set a minimum conifer growing stock target to 7,000,000m3, should I set his to 7,000,000 per period or per year (periodic or annual)?
2. Does the target table calculate an average of the growing stock for the 5-years that's within the period?
3. If my Patchworks model has variable planning period widths, do I need to adjust my target weightings to reflect this?
4. How do I deal with greenup constraints in Patchworks?

1.

If I want to set a minimum conifer growing stock target to 7,000,000m3, should I set his to 7,000,000 per period or per year (periodic or annual)?

'Feature' targets are the sum of the feature on the landscape at the end of the planning period (unlike 'products' targets which are what you produced or extracted over the planning period). If you wanted to set up a feature target that specified a minimum retention level of 7,000,000 m3 of conifer growing stock, it would not matter what the width of your planning period was. The target would always be 7,000,000, since the measurement is done at the end of the planning period, regardless of period width. A planning period is the individual reporting period. You can define the number and width of the planning periods that you want to use at the top of the PIN file.

When using the target chart you must be aware at all times whether the charts are in 'annual' or 'periodic' view (there is an icon to toggle between the two views). Annual mode divides the periodic value by the number of years in the interval. If your target is reporting growing stock, then it will be showing the total m3 present at the end of the reporting interval. If you click the button to show this as an annual average (divide by the period width) you will get growing stock divided by the number of years in the period (typically an incorrect value).

However, if the target is showing harvest volumes (for example, product.Yield), then the amount will represent the total harvested in all years of the planning period. Dividing by the number of years in the interval will result in the average amount harvested in any year. This makes sense and is very useful especially when you have reporting intervals of differing widths.

2.

Does the target table calculate an average of the growing stock for the 5-years that's within the period?

The target table should show the values in the final year of the interval for features. For products it should show the sum of the values in all years in the interval.

3.

If my Patchworks model has variable planning period widths, do I need to adjust my target weightings to reflect this?

No. The model will adjust internally to compensate for a variable period width.

4.

How do I deal with greenup constraints in Patchworks?

Create a curve that describes the greenup condition. Then create the patching targets in the PIN file. The sample dataset has an example that uses the Seral.young category to describe patch membership. There is also documentation in the User Guide dealing with Block Topology: Defining and using patch targets.