Publications

2015 

• Asiedu, R. and  Alfen, W.(2015). Understanding the Critical Failure Factors Contributing to Cost Overruns in Public Sector Project. 4^th International Conference on Infrastructure Development in Africa (ICIDA), KNUST, Ghana 25^th-26^th March, 2015.
• Asiedu, R. and  Alfen, W. (2015). Development of Cost Overrun Forecasting Model for Educational Projects in Ghana 4^th International Conference on Infrastructure Development in Africa (ICIDA), KNUST, Ghana 25^th-26^th March, 2015
• Wibowo, A., and Alfen, H.W. (2015). “Government-led Critical Success Factors in PPP Infrastructure Development.” Built, Environment and Project Asset Management, Vol. 5, No. 1, 121-134.

 2014 

• Asiedu, R. &  Alfen, W. (2014). Factors Engendering Cost Misrepresentation of Public Sector Projects in Ghana. International Journal of Sustainable Construction Engineering and Technology, 5(2), 13-24.
• Lück, Andrea; Alfen, Hans Wilhelm (2014): Methodology of economic feasibility studies of a new sanitation system. In J. Lohaus, ed. Proceedings of 17th International EWA Symposium “WatEnergyResources – Water, Energy and Resources: Innovative Options and Sustainable Solutions” during IFAT, 5-9 May 2014. Hennef: European Water Association.
• Osei-Tutu, E., Offei-Nyarko, K., Ameyaw, C., and Twumasi-Ampofo, K. (2014). Conflict of Interest and Related Corrupt Practices in Public Procurement in Ghana. International Journal of Civil Engineering Construction and Estate Management, Vol.1,No.2,pp.1-15.
• Wibowo, A., and Alfen, H.W. (2014). “Identifying Macro-Environmental Critical Success Factors and Key Areas for Improvement to Promote Public–Private Partnerships in Infrastructure: Indonesia’s Perspective.” Engineering, Construction and Architectural Management, Vol. 21, No. 4, 338-402.

 2013 

• Asamoah-Duodu, A., Danso, K. A. and Ameyaw, C. (2013). Effects of Management Practices on the Completion Time of Building Projects in Ghana. West Built Environment Research Conference (WABER), 12^th  – 14^th August, 2013, British Council, Accra, Ghana.
• Ameyaw, C., Mensah, S. and Asubonteng  J. (2013). Cost of Tendering in Ghana- Client’s Perspective. West Built Environment Research Conference (WABER), 12^th  – 14^th August, 2013, British Council, Accra, Ghana.
• Ameyaw, C., Mensah, S., and Osei-Tutu, E. (2013). Curbing Corruption in the Public Procurement Process in Ghana. Journal of  Public Policy and Administration Research (JPPAR), Vol. 3, No. 5, pp. 44 – 53.
• Latief, Y., Wibowo, A., and Iswara, W. (2013). “Preliminary Cost Estimation using Regression Analysis Incorporated with Adapative Neuro Fuzzy Inference System.” International Journal of Technology, Vol. 1, 63-72.
• Mensah, S., and Ameyaw, C. (2013). Challenges Facing District Assemblies’ “In-House” Administered Construction Contracts. West Built Environment Research Conference (WABER), 12^th  – 14^th August, 2013, British Council, Accra, Ghana.
• Mensah, S., and Ameyaw, C. (2013). Post-Contract Construction Disputes In The Ghana Health Sector: Causes and Effects. West Built Environment Research Conference (WABER), 12^th  – 14^th August, 2013, British Council, Accra, Ghana.
• Wibowo, A., and Alfen, H.W. (2013). “Fine-tunning the Value and Cost of Capital of Risky PPP Infrastructure Projects.” Engineering, Construction, and Architectural Management, Vol. 20,  No. 4, 406-419.

 2012 

• Ameyaw, C.  Oteng Seifah, S. and Mensah S. (2012) “Comparative Study of DBB AND DB Procurement Methods in Ghana. 1^st International Conference on Infrastructure Development in Africa (ICIDA, 2012), KNUST, 22^nd – 24^th March, 2012, Kumasi, Ghana.
•  Ameyaw, C., Mensah, S., Yarhards D. (2012) “Applicability of Bromilow’s Time-Cost Model on Building Projects in Ghana,  West African Built Environment Research (WABER) Conference, University of Reading, 2012.
• Ameyaw, C. (2012) “Utilization of Sawdust for the Development of Ceiling Panels”, 1^st Applied Research Conference in Africa, 29 – 31 August , 2012, Elimina Ghana
• Ameyaw, C., Mensah, S., and Osei-Tutu, E. (2012). Improving Transparency in Public Procurement in Ghana. International Public Procurement Conference (IPPC), August 18-22, 2012. Seattle, Washington, USA, 1294 - 1316. Available on: www.ippa.org/IPPC5/Proceedings/Part6/PAPER6-2.pdf
• Ameyaw, C., Mensah, S. and Osei-Tutu E. (2012) “Obstacles to the Procurement Reforms in Ghana”, Journal of Public Procurement and Contract Management
• Ameyaw, C., Mensah, S. and Osei-Tutu E. (2012). “Public Procurement in Ghana: The Implementation Challenges to The Public Procurement Law 2003 (Act 663)”, International Journal of Construction Supply Chain Management. Vol. 2, No. 2.
• Mensah, S. and Ameyaw, C., (2012) “Sustainable Procurement Integration into Ghanaian Procurement Landscape” West African Built Environment Research (WABER) Conference, University of Reading, 2012
• Santoso, J.S., Yuwono, T.B., Santosa, W., and Wibowo, A. (2012). “Public-Private-Partnerships of Tollway Construction and Operation: Risk Assessment and Allocation from the Perspective of Investors.” Journal of Construction in Developing Countries, Vol 17, No.2, 41-62.
• Wibowo, A.  et al. (2012). “Modeling Contingent Liabilities arising from Government Guarantees in Indonesian BOT/PPP Toll Roads.” ASCE Journal of Construction Engineering and Management, Vol. 138, No. 2, 1403-1410.

 2011 

• Ameyaw, C. (2011). Construction Project Delivery in Ghana: Traditional Design-Bid-Build verses Design-Build Procurement Methods. LAP Lambert Academic Publishing GmbH & Co. KG
• Ameyaw, C. Mensah, S. and Osei-Tutu E (2011). “Challenges facing the smooth implementation of Act 663, 2003 of Ghana”, West African Built Environment Research (WABER) Conference, University of Reading, 2011
• Osei-Tutu, E.,  Mensah, S. and Ameyaw, C. (2011) “The Level of Compliance with the Public Procurement ACT (ACT 663) in Ghana”, Management and Innovation for a Sustainable Built Environment Conference, 20 – 23^rd June, 2011, Amsterdam, The Netherlands.
• Osei-Tutu, E.,  Mensah, S. and Ameyaw, C (2011).“The Level of Compliance with the Public Procurement ACT (ACT 663) in Ghana”, International Journal of Project Planning and Finance
• Wibowo, A., and Kochendoerfer, B. (2011). “Selecting BOT/PPP Infrastructure Projects for Government Guarantee Portfolio under Conditions of Budget and Risk in the Indonesian Context.” ASCE Journal of Construction Engineering and Management, Vol. 137, No. 7, 512-522.

 2010 

• Ameyaw, C and Oteng Seifah, S. (2010) “Construction Project Delivery in Ghana – The performance of Traditional Procurement Method”, West African Built Environment Research (WABER) Conference, University of Reading, 2010.
• Badasyan, N. (2010): "The Essence of Quality Management Systems", Finance and Economy, Scientific Magazine, N4-5(118-119), April-May 2010, pages 37-39.
• Badasyan, N. (2010): "Efficiency of the implementation of Quality Management Systems in Armenia", RA NAS institute of Economics, Yerevan, 2010, pages 408-412.
• Badasyan, N. (2010): "Quality Infrastructure Reform for developing the Quality Management Systems in Armenia", Finance and Economy, Scientific Magazine, N7-8(121-122), July-August 2010, pages 34-37.
• Fischer, K./ Leidel, K./ Riemann, A./ Alfen, H.-W. (2010): "An integrated risk management system (IRMS) for PPP projects", Journal of Financial Management of Property and Construction, Vol. 15 Iss: 3, pp.260 – 282, 2010
• Soenandar E., Dahana M., Maimunah S., Andriani N., (2010), The Comparative Analysis for Japan Private Finance Initiative and Indonesia Public Private Partnership Project. The National Development Planning Agency Staff Enhancement Program.
• Wibowo, A., and Mohamed, S. (2010). “Risk Criticality and Allocation in Privatised Water Supply Projects in Indonesia.” International Journal of Project Management, Vol. 28, No. 5, 504-513.

 2009 

• Alfen, H.W./ Frank-Jungbecker, A. (2009): "Internationale Vernetzung – Erfahrungen aus sieben Jahren Knowledge Centre @ Weimar an der Bauhaus-Universität Weimar", in Knop, D. (Hrsg.): Public-Private Partnership Jahrbuch 2009, Convent
• Alfen, H.W./ Frank-Jungbecker, A. (2009): “Warnowquerung Rostock” Experiences from the first German PPP Road Project under the F-Model, in: A. Alfen, H.-W. (Hrsg.): "Public-Private Partnership in Infrastructure Development – Case Studies from Asia and Europe", Schriftenreiheder Professur Betriebswirtschaftslehre im Bauwesen, 2009
• Badasyan, N. (2009): "Efficiency of the implementation of quality management systems in mineral water producing companies", Finance and Economy, Scientific Magazine, N12(113), November 2009, pages 43-45.
• Frank-Jungbecker, A./ Leidel, K./ Alfen, H.W. (2009): "Lifecycle oriented Risk Management for PPP-Projects in Public Real Estate", Proceedings GICC- Global Innovation in Construction Conference 2009, Loughborough, UK

 2008 

• Wibowo, A. (2008). “Discussion of Float Consumption Impact on Cost and Schedule in the Construction Industry.” ASCE Journal of Construction Engineering and Management, Vol. 134, No. 10, 828-829.
• Wibowo, A., and Mohamed, S. (2008). “Risk Allocation in Public-Private-Partnered Water Supply Projects.” Policy Brief, Vol. 1, Australia-Indonesia Governance Research Partnership, Crawford School of Economics and Government, the Australian National University, 1-6.       

 2007 

• Fruchter, R./ Ponti, M., Frank-Jungbecker, A./ Alfen, H.W. (2007): "A scalable working model for cross-disciplinary global teamwork education", CIB 24th W78 Konferenz, Maribor, Slovenien, 2007
• Wibowo, A., and Wuryanti, W. (2007). “Capacity Factor Based Cost Models for Building of Various Functions.” Civil Engineering Dimension, Vol. 9, No.2, 70-76.

 2006 

• Fischer, K./ Jungbecker, A./ Alfen, H.W. (2006): "The emergence of PPP Task Forces and their influence on project delivery in Germany", Special Issues des International Journals of Project Management (IJPM), Nr. 24 (2006), S. 539-547
• Jungbecker, A./ Fruchter, R./ Alfen, H.W. (2006): "Implementing the PPP approach into Education", Tagungsband, 13. ERES-Konferenz 2006, Weimar
• Jungbecker, A./ Fischer, K./ Alfen, H.W. (2006): "Public-Private Partnership im Verteidigungssektor, europäische Best Practice Studie im Auftrag der g.e.b.b. (Gesellschaft für Entwicklung, Beschaffung und Betrieb)", 2005 International Journal of Project Management; Volume 24; Issue 7; Governance Issues in Public Private Partnerships; October 2006

 As a result of research activities in the EAP³N network a special journal issue with "International Journal of Project Management" (Elsevier Science Publisher) on Governance Issues in Public-Private Partnerships has been realized in 2006. All network partners as well as several external guests have contributed to a total number of 12 papers. International Journal of Project Management

• Jan, Amber YC./ Abednego, Martinus/ Singh, Boeing L. (2006): "Public Private Partnerships in Asia: Enabling Framework and Risk Profile", Conference Proceedings 13th ERES Conference, June 2006, Weimar, Germany 
• Abstract
• Jungbecker, Andrea/ Fruchter, Renate/ Alfen, Hans Wilhelm (2006): "PPP in Education", Conference Proceedings 13th ERES Conference, June 2006, Weimar, Germany
• Alfen, Hans Wilhelm/ Kleiss, Torsten (2006): "Public Private Partnerships for Municipal Solid Waste Management Projects"; 12th Annual International Sustainable Development Research Conference; April 2006; Hong Kong 
• Alfen, Hans Wilhelm/ Kleiss, Torsten (2006): "Public Private Partnerships for Municipal Solid Waste Management Projects"; 12th Annual International Sustainable Development Re-search Conference; April 2006, Hong Kong
• Wibowo, A. (2006). “CAPM-Based Valuation of Financial Government Supports to Infeasible and Risky Private Infrastructure Project.” ASCE Journal of Construction Engineering and Management, Vol. 132, No.3, 239-248.

 2005 

• Elbing, Clemens/ Jan, Amber YC (2005): "Public Private Partnerships in Europe: Track to Success, Bottlenecks and Lessons Learned from Different Countries", Conference Proceedings ERES Conference 2005, June 2005, Dublin, Ireland
• Sachs, T./ Elbing, C./ Tiong, R.L.K./ Alfen, H.W. (2005): "Efficient Assessment of Value for Money (VfM) for Selecting Effective PPP Solutions – a Comparative Study of VfM Assessment for PPPs in Singapore and Germany", Paper, published on the Queensland University of Technology Research Week, July 2005, Brisbane, Australia
• Wibowo, A., and Kochendoerfer, B. (2005). “Financial Risk Analysis of Project Finance in the Indonesian Toll Roads.” ASCE Journal of Construction Engineering and Management, Vol. 131, No. 9, 963-972.
• Wibowo, A. (2005). “Discussion of Concessionaire Selection: Methods and Criteria by Xueqing Zhang.” ASCE Journal of Construction Engineering and Management, Vol. 131, No. 7, 854-856.
• Wibowo, A. (2005). “Estimating General Threshold Traffic Level of Typical BOT Toll Road Projects in Indonesia.” Construction Management and Economics, Vol. 23, No. 6, 621-630.

  2004 

• Devapriya, K.A.K/ Alfen, Hans Wilhelm (2004): “An Empirical Analysis of Debt Capacity of Project Companies in Emerging Economies”; Journal of Financial Management in Property and Construction, Vol. 9, No.3, 2004
• Wibowo, A. (2004). “Discussion of Optimal Capital Structure Model for BOT Power Projects in Turkey by Sandalkhan Bakatjan, Metin Arikan, and Robert L.K. Tiong.” ASCE Journal of Construction Engineering and Management, Vol. 131, No. 3, 385-386.
• Wibowo, A. (2004). “Valuing Guarantees in a BOT Infrastructure Project.” Engineering, Construction and Architectural Management, Vol. 11, No. 6, 395-403.