Process Control

REAL-TIME STATISTICAL PROCESS CONTROL SYSTEM FOR WOOD PRODUCTS MANUFACTURING

• Partners: NSERC - Strategic Projects Grants
• Project description
• Research Team: Thomas Maness, Robert Kozak, Gary Schajer, Darrell Wong, Christina Staudhammer, Javier Gazzarri, Catalin Ristea, Brian Jung, Shaun St-Amour, Ron Niessen
• Status: completed
• Related Publications (see Maness et al. 2002, Maness et al. submitted 2002)

SHAPE ANALYSIS FOR REAL-TIME QUALITY SYSTEMS IN AUTOMATED SAWMILLS

• Partners: Perforex (CAM Technologies Inc.)
• Project description
• Research Team: Helen Rasmussen, Thomas Maness, Robert Kozak
• Status: completed
• Related Publications

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STATISTICAL PROCESS CONTROL OF COLOUR FOR WOOD PRODUCTS

• Partners: NSERC - Research Grants Program
• Project description
• Research Team: Robert Kozak, Phil Evans, Derek Thompson
• Status: on-going
• Related Publications

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QUALITY CONTROL METHODS FOR MONITORING THE VARIABILITY OF MOISTURE CONTENT IN KILN-DRIED LUMBER

• Partners: Wagner Electronic Products, Inc.
• Project description
• Research Team: Catalin Ristea, Thomas Maness
• Status: completed project
• Related Publications (see Ristea & Maness, 2002)

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Staudhammer, C., T.C. Maness and R.A. Kozak.  2007.  New SPC methods for identifying lumber manufacturing defects with real-time laser range sensor data.  Journal of Quality Technology. 39(3):224-240

Thoews, S.E, T.C Maness, and C. Ristea. 2008.  Using flow simulation as a decision tool for improvements in sawmill productivity. Maderas. Ciencia y tecnología. 10(3):229-242.  Concepcion, Chile.

Staudhammer, C., R.A. Kozak and T.C. Maness. 2006. SPC methods for detecting simple sawing defects using real-time laser range data. Wood and Fiber Science, Vol. 38, No. 4, pp. 396-716

Ye, L. and T.C. Maness.  2006.  A goal-seeking optimization algorithm for optimizing chop saws.  Forest Products Journal. 56 (11/12):73-78

Schajer, G.S., J.I. Gazzarri, D.C. Wong, T.C. Maness and R.A. Kozak.  2005.  Scanner system for separate-sided lumber surface measurements. Forest Products Journal.  55(12):175-180

Staudhammer, C.L. V.M. LeMay, R.A. Kozak, and T.C. Maness. 2005. Mixed-Model Development for Real-Time Statistical Process Control Data in Wood Products Manufacturing. Forestry, Biometry, Modeling and Information Sciences, 1(2005):19-35

Maness, T.C., R.A. Kozak and C. Staudhammer. 2004. Reliability Testing of Statistical Process Control Procedures for Manufacturing with Multiple Sources of Variation. Wood and Fiber Science 36(3):443-458.

Rasmussen, H.K., R.A. Kozak and T.C. Maness. 2004. An Analysis of Machine-Caused Lumber Shape Defects in British Columbia Sawmills. Forest Products Journal 54(6):47-56

Ristea, C, and T.C. Maness.  2005.  Analyzing the distribution of moisture content in kiln-dried lumber using goodness of fit techniques – with procedures.  Journal of the Institute of Wood Science. 17(1):11-23

Ristea, C and T.C. Maness.  2005.  Lognormal control charts for moisture content of kiln-dried lumber.  Wood and Fiber Science.  37(1)2005 pp. 160-174

T. C. Maness, R.A. Kozak and C. Staudhammer. 2003. Applying Real-time Statistical Process Control to Manufacturing Processes Exhibiting Between and Within Part Size Variability. Journal of Quality Engineering. 16(1):113-125.

Kozak, R.A. and T.C. Maness. 2003. A system for continuous process improvement in wood products manufacturing. Holz als Roh und Werkstoff. 61:95-102

Maness, T.C., C. Staudhammer and R.A. Kozak. 2002. Statistical Considerations for Real-Time Size Control Systems in Wood Products Manufacturing. Wood and Fiber Science, 34(3):476-484.

Maness, T.C., and Wong, D. 2002. A benchmarking system for evaluating the profitability and efficiency of optimizing chop saw systems. Forest Products Journal.  52(10):52-61

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Gazzarri, J.I., G.S. Schajer, T.C. Maness, R.A. Kozak and D.C. Wong (2003). Scanner system for separate sided lumber surface measurements. 10th International Conference on Scanning Technology & Process Optimization for the Wood Products Industry. Seattle, WA. October, 2003

Gazzarri, J.I., G.S. Schajer, T.C. Maness, R.A. Kozak and D.C. Wong (2003). Separate-Sided Lumber Surface Quality Control in Sawmills. The 16th International Wood Machining Seminar: Monitoring and Process Control, Surface Quality (Session 9), August 2003, Matsue, Japan

Maness, T.C., R.A. Kozak, C. Staudhammer and D. Wong. Next generation statistical process control systems for detection of wood machining defects employing online diagnostics and feedback control. Forest Products Society 57th Annual Meeting: Advanced Information Technology Systems for Forest Products Manufacture (Session 15), June 2003, Bellevue / Seattle, Washington. USA

June 2002. Christina Staudhammer, Thomas Maness, Robert Kozak. "Applying Real-time Statistical Process Control to Manufacturing Processes Exhibiting Between and Within Part Size Variability". Presented at Forest Products Society Meeting - Madison (Wisconsin, USA).

Wong, D.C. and Maness, T.C. 1999. "Factors Affecting the Profitability and Yield of Optimizing Chop Saw Performance". 6th International Conference on Sawing Technology. Wood Machining Institute, Seattle, Washington, November, 1999.

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Ristea, C., J. Felsheim, and T.C. Maness. 2003. Method for monitoring wood-drying kiln state. US Patent Application No. 10/722,389. Filed November 28, 2003.

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