Research Interests:
Forest Sciences Centre 2931
2424 Main Mall
Vancouver, BC V6T 1Z4
work phone: 6048226109

Areas of research include:

  • Supply chain management
  • Mathematical modeling and optimization
  • Multi-criteria decision making
  • Simulation
  • Life cycle assessment


Integrated and sustainable forest biomass supply chain


Inventory and routing optimization in forest biomass supply chain


Operational level transportation, inventory and processing optimization of forest biomass supply chain


Professional Affiliations

Association of Professional Engineers and Geoscientists of BC APEGBC
Canadian Operational Research Society CORS
Institute for Operations Research and Management Sciences INFORMS
Institute of Industrial Engineers IIE


CORS (Canadian Operational Research Society) Service Award , 2012
UBC Killam Teaching Prize 2011-12, Faculty of Forestry Nominee: Runner up
Award for outstanding application of operational research – Second prize – Canadian Operational Research Society , 2006
Tuition Award to attend , 2006

Current Graduate Students

Shaghaygh Akhatari, Ph.D.
Integrated forest biomass supply chain optimization considering uncertainties
Krishna Malladi, Ph.D.
Inventory routing optimization in forestry
Evelyn Gao, Masters
Analysis and optimization of biomass logistics

Post Doctoral Fellows and Research Assistants

Dr. Olivier Quirion-Blais

Current Courses

Winter 2017

WOOD440 Engineering Economics Sections

Use of engineering economics to evaluate investment proposals of an engineering nature, including decision making processes, time value of money, cash flow analysis, comparison methods, depreciation, replacement analysis, taxes, inflation and sensitivity analysis.

Winter 2017

WOOD330 Industrial Engineering Sections

Use of industrial engineering concepts and methods to analyze and improve organizations, including operations strategy and competitiveness, quality control, work measurement, inventory management, linear programming, sensitivity analysis, transportation problems, and capacity planning.

Winter 2017

WOOD492 Modeling for Decision Support Sections

Applications of mathematical modeling, optimization, and simulation in forest planning and manufacturing; formulating models and interpreting results for decision support.

Selected Publications

Opacic, L., Sowlati, T. (2017). Applications of discrete-event simulation in the forest products sector – A review Forest Products Journal, 67(3/4): 219-229.
Malladi, K., Sowlati, T. (2017). Optimization of operational level transportation planning in forestry: A review International Journal of Forest Engineering. In Press.
Akhtari, S., Sowlati, T., Verena Griess (2017). Integrated strategic and tactical optimization of forest-based biomass supply chains to address medium-term supply and demand variations Applied Energy. In Press.
Piltan, M., Sowlati, T. (2016). A multi-criteria decision support model for evaluating the performance of partnerships Expert Systems with Applications, 45: 373-384.
Cambero, S., Sowlati, T., Pavel, M. (2016). Economic and life cycle environmental optimization of forest-based biorefinery supply chains for bioenergy and biofuel production Chemical Engineering Research and Design. 107: 218-235.
Akhtari, S., Sowlati, T. (2016). Hybrid simulation and optimization approaches to tackle supply chain complexities – A review with a focus on forest products supply chains J-FOR: The Journal of Science and Technology for Forest Products and Processes. 5(5): 26-39.
Piltan, M., Sowlati, T. (2016). Multi-criteria assessment of partnership components Expert Systems with Applications, 64: 605-617.
Cambero, C., Sowlati, T. (2016). Incorporating social benefits in multi-objective optimization of forest-based bioenergy and biofuel supply Applied Energy. 178:721-735.
Shabani, N., Sowlati, T. (2016). Evaluating the impact of uncertainty and variability on the value chain optimization of a forest biomass power plant International Journal of Green Energy. 13(7): 631-641.
Shabani, N., Sowlati, T. (2016). A hybrid stochastic programming-robust optimization model for maximizing the value chain of a forest biomass power plant under uncertainty Journal of Cleaner Production, 112 (4): 3285-3293.
Piltan, M., Sowlati, T. Cohen, D., Gaston, C., Kozak, R. (2016). Analysis of the drivers and factors influencing partnership performance in the British Columbia’s forest products supply chain J-FOR: The Journal of Science and Technology for Forest Products and Processes. 5(5): 65-76.
Sowlati, T. (2016). Modeling of forest and wood residues supply chains for bioenergy and biofuel production Elsevier/ Woodhead Publishing series in Energy. Jens Bo Holm-Nielsen and Ehiaze Augustine Ehimen (eds.).
Homebach, L., Cambero, C., Sowlati, T., Walther, G. (2016). Optimal design of supply chains for second generation biofuels incorporating European biofuel regulations Journal of Cleaner Production. 131: 565-575.
Cambero, C., Alexandre, M., Sowlati, T. (2015). Life cycle greenhouse gas analysis of bioenergy generation alternatives using forest and wood residues in remote locations: a case study in British Columbia, Canada Resources, Conservation & Recycling, 105: 59-72.
Cambero, C., Sowlati, T., Marinescu, M., Roser, D. (2015). Strategic optimization of a forest residue to bioenergy and biofuels supply chain International Journal of Energy Research, 39: 439-452.
Mobini, M., Sowlati, T. Roser, D. (2014). Utilization of forest harvesting residues for bioenergy generation: applications of simulation modeling Executive Summary. NSERC Strategic Network on Value Chain Optimization. Issue 15, Nov. 2014
Piltan, M., Sowlati, T. (2014). A successful partnership for getting more value from the forest Branchlines, 24 (4): 6-7.
Shabani, N., Sowlati, T. Ouhimmou, M., Ronnqvist, M. (2014). Tactical supply chain planning for a forest biomass power plant under supply uncertainty Energy – The International Journal, 78: 346-355.
Sowlati, T. (2014). Current and future role of information technology in the global forest sector. In The Global Forest Sector: Changes, Practices, and Prospects. E. Hansen, R. Panwar, and R. Vlosky (eds.). CRC press
Akhtari, S., Sowlati, T., Day, K. (2014). Optimal flow of forest biomass to a district heating system in Williams Lake, BC. International Journal of Energy Research. 38: 945-964.
Akhtari S., Sowlati ,T., Day, K. (2014). Economic feasibility of utilizing forest biomass in district energy systems: A review Renewable and Sustainable Energy Reviews, 33: 117 – 127
Akhtari S., Sowlati, T., Day , K. (2014). The effects of variations in supply accessibility and amount on economics of using regional forest biomass for generating district heat Energy-The International Journal, 67: 631-640
Piltan, M. Sowlati, T. (2014). A review of partnership studies in the forest products value chains – with a focus on developed countries (US, Canada and Western Europe) Forest Products Journal. 64 (1/2): 4-10.
Ebadian, M., Sowlati, T., Sokhansanj, S., Stumborg, M., Townley-Smith, L. (2014). Development of an integrated tactical and operational planning model for supply of feedstock to a commercial-scale bioethanol plant Biofuels, Bioproducts and Biorefining. 8: 171-188.
Mobini, M., Meyers, J., Trippe, F., Sowlati, T., Froehling, M., Schultmann, F (2014). Assessing the integration of torrefaction into the wood pellet production Journal of Cleaner Production. 78: 216-225.
Cambero, C., Sowlati, T. (2014). Assessment and optimization of forest biomass supply chains from economic, environmental and social perspectives – A review of literature Renewable and Sustainable Energy Reviews. 36: 62-73.
Mobini, M., Sowlati, T., Sokhansanj, S. (2013). A simulation model for the design and analysis of wood pellet supply chain Applied Energy, 111: 1239-1249.
Shabani, N., Akhtari, S., Sowlati, T. (2013). Value chain optimization of forest biomass for bioenergy production: A review Renewable and Sustainable Energy Reviews, 23: 299-311.
Hewitt, R., Sowlati, T., Paradi, J.C. (2012). Analysis of Available Software Products in the North American Cabinet Industry International Journal of Management Science, 5(3):281-296.
Ebadian, M., Sowlati, T., Sokhansanj, S., Stumborg, M., Townley-Smith, L. (2012). Modeling and analyzing storage systems in agricultural biomass supply chain for cellulosic ethanol production Applied Energy, 102: 840-849.
Hewitt, R. Sowlati, T., Paradi, J.C. (2012). Evaluation of strategic software investment for the Canadian cabinet industry Forest Products Journal, 62(7/8): 597-606.
Shabani, N., Sowlati, T., (2012). A mixed integer non-linear programming model for tactical value chain optimization of a wood biomass power plant. Applied Energy, 104: 353-361.
Lindroos, O., Nilsson, B., Sowlati, T. (2011). Costs, CO2 emissions and energy balances of applying Nordic slash recovery methods in British Columbia Western Journal of Applied Forestry, 26(1):30-36.
Ghafghazi, S., Sowlati, T., Sokhansanj, S., Bi, X., Melin, S. (2011). Life cycle assessment of base-load heat sources for district heating system options International Journal of Life Cycle Assessment, 16(3): 212-223.
Ghafghazi, S., Sowlati, T., Sokhansanj, Bi, X., S., Melin, S. (2011). Particulate matter emissions from combustion of wood in district heating applications Renewable and Sustainable Energy Reviews, 15(1): 3019-3028
Hewitt, R., Sowlati, T., Paradi, J.C (2011). Information Technology Adoption in United States and Canadian Forest Industries Forest Products Journal, 61(2):161-169.
Mobini, M., Sowlati, T., Sokhansanj, S. (2011). Forest biomass supply logistics for a power plant using the discrete-event simulation approach Applied Energy. 2011. 88 (4): 1241-1250.
Ebadian, M., Sowlati, T., Sokhansanj, S., Stumborg, M., Townley-Smith, L. (2011). A new simulation model for multi-agricultural biomass logistics system in bioenergy production Biosystems Engineering, 110 (3):280-290.
Tumuluru, J.S., Sokhansanj, S., Lim, C.J., Bi, X., Lau, A., Melin, S., Sowlati, T., Oveisi, E. (2010). Quality of wood pellets produced in British Columbia for export Applied Engineering in Agriculture, 26(6):1013-1020.
Stephen, J., Sokhansanj, S., Bi, X., Sowlati, T., Kloeck, T., Twonly-Smith, L., Stumborg, M.A. (2010). The impact of agricultureal residue yield range on the delivered cost to a biorefinery in the Peace River Region of Alberta Biosystems Engineering, 105(3): 298-305.
Stephen, J., Sokhansanj, S., Bi, X., Sowlati, T., Kloeck, T., Townley-Smith, L., Stumborg, M.A. (2010). Analysis of biomass feedstock availability and variability for the Peace River region of Alberta, Canada Biosystems Engineering, 105(1): 103-111.
Sowlati, T., Assadi, P., Paradi, J.C. (2010). Developing a mathematical programming model for sensitivity analysis in analytic hierarchy process International Journal of Mathematics in Operations Research, 2(3): 290-301.
Ghafghazi, S., Sowlati, T., Sokhansanj, S., Melin, S. (2010). Techno-economic analysis of renewable energy source options for a district heating project International Journal of Energy Research, 34: 1109-1120.
Ghafghazi, S., Sowlati, T., Sokhansanj, S., Melin, S. (2010). A multi-criteria approach for evaluating district heating system options Applied Energy, 87(4):1134-1140.
Assadi, P., Sowlati, T. (2009). Design and manufacturing software selection in the wood industry using Analytic Hierarchy Process International Journal of Business Innovation and Research, 3(2): 182-198.
Assadi, P., Sowlati, T., Paradi, J.C. (2009). Multi-criteria evaluation of design and manufacturing software packages considering the interdependencies between criteria: The ANP approach International Journal of Information and Decision Sciences, 1(4): 397-410.
Chau, J. , Sowlati, T., Sokhansanj, S., Preto, F., Melin, S., Bi, T. (2009). Economic sensitivity of wood biomass utilization for greenhouse heating application Applied Energy, 86(5): 616-621.
Mahmoudi, M., Sowlati, T., Sokhansanj, S. (2009). The Logistics of Supplying Biomass from a Mountain Pine Beetle Infested Forest to a Power Plant in British Columbia Scandinavian Journal of Forest Research, 24(1): 76-86.
Chau, J., Sowlati, T., Sokhansanj, S., Preto, F., Melin, S., Bi, X. (2009). Optimizing the mixture of wood biomass for greenhouse heating International Journal of Energy Research, 33(1): 274-284.
Chau, J., Sowlati, T., Sokhansanj, S., Preto, F., Melin, S., Bi, X. (2009). Techno-economic analysis of wood biomass biolers for the greenhouse industry Applied Energy, 86 (3): 364-371
Chau, J., Sowlati, T. (2009). Wood biomass for greenhouse heating Branchlines, , 20 (2): 20-21
Salazar, J., Sowlati, T. (2008). A review on life cycle assessment of windows Forest Products Journal, 59 (10): 91-96.
Vahid, S., Sowlati, T. (2008). Productivity changes of the wood product manufacturing sector in the US Applied Mathematical Sciences, 2 (17): 799-816
Salazar, J., Sowlati, T. (2008). Life cycle analysis of windows for the residential market in North America Scandinavian Journal of Forest Research, 23(2): 121-132
Aydinel, M., Sowlati, T., Cerda, X., Cope, E., Gerschman, M. (2008). Optimization of production allocation and transportation of customer orders for a leading forst products company Mathematical and Computer Modelling, 48(7/8): 1158-1169.
Vahid, S., Sowlati, T. (2007). Efficiency analysis of the Canadian wood product manufacturing sub-sectors– A DEA approach Forest Products Journal, 57(1/2): 71-77.
Salehirad, N., Sowlati, T. (2007). Dynamic efficiency analysis of the primary wood producers in British Columbia Mathematical and Computer Modelling, 45 (9/10): 1179-1188
Sowlati, T. (2007). The use of nonparametric statistical tests in defining the number of periods to include in an intertemporal DEA analysis International Transactions in Operational Research, 14: 203-215
Salehirad, N., Sowlati, T. (2006). Productivity and efficiency assessment of the wood industry – A review with a focus on Canada Forest Products Journal. 56(11/12): 25-32.
Sowlati, T., Vahid, S. (2006). Malmquist total factor productivity of manufacturing sector in Canada Scandinavian Journal of Forest Research. 21(5): 424-433
Salazar, J., Sowlati, T. (2006). Life cycle assessment of windows Branchlines. 17(1):4-5
Salazar, J., Sowlati, T. (2006). Modeling the life cycle processes of aluminum clad wood windows Technical Session Proceedings – Wood Biomass Utilization: Challenges and Opportunities. Forest Products Society 60th International Convention.
Salehirad, N., Sowlati, T. (2005). Performance Analysis of Primary Wood Producers in British Columbia using DEA Canadian Journal of Forest Research. 35(2): 285-294
Marinescu, M., Sowlati, T., Maness, T. (2005). The development of a timber allocation model using Data Envelopment Analysis Canadian Journal of Forest Research. 35(10): 2304-2315.
Sowlati, T. (2005). Efficiency Studies in Forestry using Data Envelopment Analysis Forest Products Journal. 55(1): 49-57
Sowlati, T., Paradi, J.C., Suld, C. (2005). Information Systems Project Prioritization using Data Envelopment Analysis Mathematical and Computer Modelling. 41(11/12): 1279-1298
Sowlati, T., Paradi, J.C. (2004). Establishing the Practical Frontier in Data Envelopment Analysis Omega – International Journal of Management Science. 32(4):261-272
Sowlati, T. (2003). Compression data to compete: Is Data Envelopment the answer? Woodworking Magazine, Volume 17, Issue 2, page 31
Sowlati, T. (2002). Efficiency Improvement in the Canadian Wood Industry Branchlines. 13(1): 2