Estimating harvester productivity in Pinus radiata plantations using StanForD stem files

$61.20 plus tax (Refund Policy)

Buy Article:


Productivity models produced using time differences between consecutive StanForD stem files collected by harvester onboard computers were compared with models produced using traditional time and motion techniques for the same initial trees. Three sites were studied in Pinus radiata plantation clearfell operations across southern Australia. Delays and trees with multiple leaders or broken tops were removed from the data. This was done for the stem file data using filters. The same filters were applied to data from all sites. No significant differences were found between the models at each site, though the stem file productivity models generally had a poorer fit than the time and motion models. The advantages of using stem files for modelling are the ready availability of stem file data, which enables rapid creation of generalised harvester productivity models and avoids short-term changes in productivity caused by the presence of an observer (the “Hawthorne effect”). Disadvantages are the inability to account for unforeseen changes in conditions during data collection, and the inability to isolate work-cycle time-element data.

Keywords: Harvester; StanForD; productivity model; radiata pine; stem file

Document Type: Research Article


Affiliations: 1: CRC Forestry,University of Melbourne, Burnley,Victoria, Australia 2: CRC Forestry,University of Tasmania, Hobart,Tasmania, Australia

Publication date: January 1, 2013

More about this publication?
Related content

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more