{"_id":"574c04a5cf99610e00ef7ce1","__v":0,"user":{"_id":"574bfb9290d8b32000864973","username":"","name":"Tigermoth Support"},"initVersion":{"_id":"574a3bc0d1d1381900b73fae","version":"3517"},"project":"574a3bc0d1d1381900b73fab","createdAt":"2016-05-30T09:15:17.854Z","changelog":[{"_id":"574c04a5cf99610e00ef7cf3","update":"- A new template has been included called “Results - Model metrics and forest mass measures.xlsb” which is focused on reporting the key metrics of the forest estate model’s solution. Metrics include harvest volume, area and averages for each of clearfell, first, second and third thinning operations. Productive forest area, area waiting regeneration (AWR) and standing area measures. Forest growing stock is calculated including current annual increment, annual change in growing stock and implied mean annual increment at clearfell. The charts and tables in the workbook are designed to give the analysis all of the key metrics and forest measures for reporting on the forest estate.","type":"added"},{"_id":"574c04a5cf99610e00ef7cf2","update":"- The new valuation template called “Valuation - Large format all rotations with multiple thinning” can be used to report multi-thinning stumpages by operation (CF, T1, T2 & T3+).","type":"added"},{"_id":"574c04a5cf99610e00ef7cf1","update":"- The Current Rotation and Future Rotation spreadback templates have been updated so that planning units that have no TRV at any age are incorporated in the valuation summary. Previously such planning units would be ignored.","type":"added"},{"_id":"574c04a5cf99610e00ef7cf0","update":"- Cells that define the minimum and maximum age of wood for any constraint can be left blank. The absence of data defines the defaults of Min Age = 0 and Max Age = [maximum possible age]. Users only need to provide data when the defaults are not appropriate.","type":"improved"},{"_id":"574c04a5cf99610e00ef7cef","update":"- Within forest description worksheets where the first data column defines the Start Period of a constraint, prefixing the start period with a hash ‘#’ will prevent the constraint from being processed.","type":"added"},{"_id":"574c04a5cf99610e00ef7cee","update":"- There is a new optimization option to “Maximise volume and ignore financial objective”. Activating this check box before optimization will maximize the volume within the model and no financial information will be included in the objective function. Users can choose to maximize clearfell volume, thinning volume or both.","type":"added"},{"_id":"574c04a5cf99610e00ef7ced","update":"- There is a new template called 'Macros - Convert datafile to Tigermoth format.xlsb' that can be used to convert existing tabular yield table data formats to a Tigermoth compatible format.","type":"added"},{"_id":"574c04a5cf99610e00ef7cec","update":"- The start period of any model constraint cannot be set to Period 0. The start period must be greater than or equal to 1. Constraints defined as starting in Period 0 will now be interpreted as starting in Period 1. This is backwardly compatible and won't impact existing models because those models previously would have given an error when importing.","type":"improved"},{"_id":"574c04a5cf99610e00ef7ceb","update":"- Data entered on the worksheet ‘Rotation’ sheet defines the maximum possible period of a model. For example, if the maximum possible growing period on worksheet 'Rotation' is 60 and on the ‘Allocation’ worksheet a user has entered a constraint starting before Period 60 and ending at Period 70, then this value is ignore and Period 60 takes precedence. Existing forest descriptions are unaffected because they would have generated an error with such data.","type":"added"},{"_id":"574c04a5cf99610e00ef7cea","update":"- Previously a model would halt with an error if all plunits did not have an explicit regeneration option defined. Regeneration now defaults to the original plunit if not explicitly defined. This can greatly simplify the specification of regeneration options, i.e. if all future rotation plunits regenerate to themselves then this option does not have to be explicitly shown. Existing forest descriptions are unaffected because they would have had all regeneration options already entered.","type":"improved"},{"_id":"574c04a5cf99610e00ef7ce9","update":"- The data extraction routines now use temporary tables and less memory to speed up extraction from forest descriptions with very large numbers of planning units.","type":"improved"},{"_id":"574c04a5cf99610e00ef7ce8","update":"- A replanting lag equal to, or greater than 0 years can now be defined. Previously the default was a one-year replanting lag within the system, that is in the year after clearfell (CF+1) then a regenerated planning unit would be exactly Age 0 (zero months of growth). Twelve months later (CF+2) the planning unit would have grown for a full twelve months and would be exactly Age 1. Any replanting lag can now be defined for any planning unit. A zero-year replanting lag will result in Age 0 establishment costs occurring in the year of clearfell (CF+0). A mixture of replanting lags can be used to target (for example) an estate average of 18 months before establishment, i.e. 50% have a one-year lag & 50% have a two-year lag.","type":"added"},{"_id":"574c04a5cf99610e00ef7ce7","update":"- The number of stems removed at the time of production thinning and clearfell can be included in the standard yield table data using the product Type epithet ‘THSC’ for Thinning Stem Count and ‘CFSC’ for Clearfell Stem Count. The data needs to show the count of the number of stems removed at the time of the operation. When THSC and CFSC data are populated the resulting Average Piece Size for operations CF, T1, T2 and T3+ can be calculated and reported on the template “Results - Model metrics and forest mass measures”.","type":"added"},{"_id":"574c04a5cf99610e00ef7ce6","update":"- Two new harvesting constraint types called 'BINARY CUT' and 'SENESCENT' have been added. The recently add SCHEDULED constraint has been improved. All three of these constraints automatically take precedence over conflicts that would otherwise exist with any defined minimum and maximum clearfell ages.","type":"added"},{"_id":"574c04a5cf99610e00ef7ce5","update":"- **BINARY CUT** constraints use mixed integer programming to offer an all or nothing outcome for clearfelling a grouping of plunit(s). A BINARY CUT is given an operational range (for example Periods 1..3) and then all the plunits of the constraint need to be harvested in a discreet period, the choice of which is decided by the optimizer from within the defined period range (i.e. if the period range was 3..6 then periods 1..2 and 7+ cannot be considered for clearfelling, and only one of the four periods 3..6 can be selected for clearfelling. The constraint has been designed for tactical scheduling of stands for near-term planning, and sequencing.","type":"added"},{"_id":"574c04a5cf99610e00ef7ce4","update":"- **SCHEDULED** constraints have been designed for the implementing a pre-determined harvest plan and to give planning units an operational window for clearfell. The SCHEDULED constraint has a period range and the period range can have an additional area or volume constraint applied, which will be valid in every period of the range apart from the last. This is to allow a stand to be given a partial clearfelling in the first period of the range, and then the residual area depleted in the subsequent. Two use are harvesting a large area in first period, and then a small remaining area (i.e. matching a predefined harvest plan), or harvesting a very small area in the first period and then the remaining large are in the second (i.e. a road-lining example).","type":"improved"},{"_id":"574c04a5cf99610e00ef7ce3","update":"- **SENESCENT** constraints indicate planning units that can grow to any age within the defined period range. The plunits are excluded from clearfelling during the period range of the SENESCENT constraint, for example 1..60 would allow the planning units defined with the constraint to grow to any age across periods 1 to 60. Importantly there is no need to manually account for the increasing rotation age on the worksheet 'Rotation'.","type":"added"},{"_id":"574c04a5cf99610e00ef7ce2","update":"","type":"added"}],"body":"Additions, changes and corrections available in this build:","slug":"3517100465892-","title":"3517.10046.5892"}

3517.10046.5892


Additions, changes and corrections available in this build:
added
- A new template has been included called “Results - Model metrics and forest mass measures.xlsb” which is focused on reporting the key metrics of the forest estate model’s solution. Metrics include harvest volume, area and averages for each of clearfell, first, second and third thinning operations. Productive forest area, area waiting regeneration (AWR) and standing area measures. Forest growing stock is calculated including current annual increment, annual change in growing stock and implied mean annual increment at clearfell. The charts and tables in the workbook are designed to give the analysis all of the key metrics and forest measures for reporting on the forest estate.
added
- The new valuation template called “Valuation - Large format all rotations with multiple thinning” can be used to report multi-thinning stumpages by operation (CF, T1, T2 & T3+).
added
- The Current Rotation and Future Rotation spreadback templates have been updated so that planning units that have no TRV at any age are incorporated in the valuation summary. Previously such planning units would be ignored.
improved
- Cells that define the minimum and maximum age of wood for any constraint can be left blank. The absence of data defines the defaults of Min Age = 0 and Max Age = [maximum possible age]. Users only need to provide data when the defaults are not appropriate.
added
- Within forest description worksheets where the first data column defines the Start Period of a constraint, prefixing the start period with a hash ‘#’ will prevent the constraint from being processed.
added
- There is a new optimization option to “Maximise volume and ignore financial objective”. Activating this check box before optimization will maximize the volume within the model and no financial information will be included in the objective function. Users can choose to maximize clearfell volume, thinning volume or both.
added
- There is a new template called 'Macros - Convert datafile to Tigermoth format.xlsb' that can be used to convert existing tabular yield table data formats to a Tigermoth compatible format.
improved
- The start period of any model constraint cannot be set to Period 0. The start period must be greater than or equal to 1. Constraints defined as starting in Period 0 will now be interpreted as starting in Period 1. This is backwardly compatible and won't impact existing models because those models previously would have given an error when importing.
added
- Data entered on the worksheet ‘Rotation’ sheet defines the maximum possible period of a model. For example, if the maximum possible growing period on worksheet 'Rotation' is 60 and on the ‘Allocation’ worksheet a user has entered a constraint starting before Period 60 and ending at Period 70, then this value is ignore and Period 60 takes precedence. Existing forest descriptions are unaffected because they would have generated an error with such data.
improved
- Previously a model would halt with an error if all plunits did not have an explicit regeneration option defined. Regeneration now defaults to the original plunit if not explicitly defined. This can greatly simplify the specification of regeneration options, i.e. if all future rotation plunits regenerate to themselves then this option does not have to be explicitly shown. Existing forest descriptions are unaffected because they would have had all regeneration options already entered.
improved
- The data extraction routines now use temporary tables and less memory to speed up extraction from forest descriptions with very large numbers of planning units.
added
- A replanting lag equal to, or greater than 0 years can now be defined. Previously the default was a one-year replanting lag within the system, that is in the year after clearfell (CF+1) then a regenerated planning unit would be exactly Age 0 (zero months of growth). Twelve months later (CF+2) the planning unit would have grown for a full twelve months and would be exactly Age 1. Any replanting lag can now be defined for any planning unit. A zero-year replanting lag will result in Age 0 establishment costs occurring in the year of clearfell (CF+0). A mixture of replanting lags can be used to target (for example) an estate average of 18 months before establishment, i.e. 50% have a one-year lag & 50% have a two-year lag.
added
- The number of stems removed at the time of production thinning and clearfell can be included in the standard yield table data using the product Type epithet ‘THSC’ for Thinning Stem Count and ‘CFSC’ for Clearfell Stem Count. The data needs to show the count of the number of stems removed at the time of the operation. When THSC and CFSC data are populated the resulting Average Piece Size for operations CF, T1, T2 and T3+ can be calculated and reported on the template “Results - Model metrics and forest mass measures”.
added
- Two new harvesting constraint types called 'BINARY CUT' and 'SENESCENT' have been added. The recently add SCHEDULED constraint has been improved. All three of these constraints automatically take precedence over conflicts that would otherwise exist with any defined minimum and maximum clearfell ages.
added
- **BINARY CUT** constraints use mixed integer programming to offer an all or nothing outcome for clearfelling a grouping of plunit(s). A BINARY CUT is given an operational range (for example Periods 1..3) and then all the plunits of the constraint need to be harvested in a discreet period, the choice of which is decided by the optimizer from within the defined period range (i.e. if the period range was 3..6 then periods 1..2 and 7+ cannot be considered for clearfelling, and only one of the four periods 3..6 can be selected for clearfelling. The constraint has been designed for tactical scheduling of stands for near-term planning, and sequencing.
improved
- **SCHEDULED** constraints have been designed for the implementing a pre-determined harvest plan and to give planning units an operational window for clearfell. The SCHEDULED constraint has a period range and the period range can have an additional area or volume constraint applied, which will be valid in every period of the range apart from the last. This is to allow a stand to be given a partial clearfelling in the first period of the range, and then the residual area depleted in the subsequent. Two use are harvesting a large area in first period, and then a small remaining area (i.e. matching a predefined harvest plan), or harvesting a very small area in the first period and then the remaining large are in the second (i.e. a road-lining example).
added
- **SENESCENT** constraints indicate planning units that can grow to any age within the defined period range. The plunits are excluded from clearfelling during the period range of the SENESCENT constraint, for example 1..60 would allow the planning units defined with the constraint to grow to any age across periods 1 to 60. Importantly there is no need to manually account for the increasing rotation age on the worksheet 'Rotation'.