Process efficiency improvement through DMAIC method: action research in a chocolate factory



DMAIC, Six Sigma, Food Industry, Action research,


The food industry plays an important role both in promoting jobs to improve the economy and in providing reliable and safe food to society. However, the sector faces several challenges in search of efficiency and productivity. Therefore, the present work aims to increase the efficiency of a chocolate production line in a large company through a DMAIC implementation method. The research was carried out through a systematic literature review regarding the DMAIC implementation method in the food industry. In addition, the work was carried out through action research for six months in a large-scale chocolate factory located in the metropolitan region of Espírito Santo. Using different quality techniques and tools to investigate problems such as Project Charter, Pareto diagram, brainstorming, and cause and effect diagram, the efficiency of the process was increased from 56% to 79%. Finally, the final considerations are made, containing the academic and practical contributions as well as the limitations of research and opportunities for future work.

Author Biographies

Lukas Paiva da Silva, Instituto Federal do Espirito Santo

Engenheiro de Produção

Luiz Gabriel Pereira Herzog, Universidade Federal de Santa Catarina

Departamento de Engenharia de Produção e Sistemas

Cintia Tavares do Carmo, Instituto Federal do Espírito Santo

Doutora em Sociologia Política

Fernando Antônio Forcellini, Universidade Federal de Santa Catarina

Pós-Doutor em Engenharia de Produção.


Al-Aomar, R., Al-Saberi, A., Al-Ameri, M., Al-Wahedi, A., & Eke, K. (2017). Six sigma application to food and beverage testing services. Journal of Engineering and Applied Sciences, 12(4), 819–824.

Al-Aomar, R., & Hussain, M. (2019). Exploration and prioritization of lean techniques in a hotel supply chain. International Journal of Lean Six Sigma, 10(1), 375–396.

Al-Samarraie, H., & Hurmuzan, S. (2018). A review of brainstorming techniques in higher education. Thinking Skills and Creativity, 27(October 2017), 78–91.

Alexander, P., Antony, J., & Rodgers, B. (2019). Lean Six Sigma for small- and medium-sized manufacturing enterprises: a systematic review. International Journal of Quality and Reliability Management, 36(3), 378–397.

Álvarez, E. A., Lozano, J. P., & Sampayo, E. F. (2017). Waste reduction in a toast production line using Six sigma methodology. Proceedings of the International Conference on Industrial Engineering and Operations Management, 33–45.

C.R, A., & Thakkar, J. J. (2019). Application of Six Sigma DMAIC methodology to reduce the defects in a telecommunication cabinet door manufacturing process: A case study. International Journal of Quality and Reliability Management, 36(9), 1540–1555.

Costa, L. B. M., Godinho Filho, M., Fredendall, L. D., & Ganga, G. M. D. (2020). The effect of Lean Six Sigma practices on food industry performance: Implications of the Sector’s experience and typical characteristics. Food Control, 112(November 2019), 107110.

Costa, L. B. M., Godinho Filho, M., Fredendall, L. D., & Gómez Paredes, F. J. (2018). Lean, six sigma and lean six sigma in the food industry: A systematic literature review. Trends in Food Science and Technology, 82(October), 122–133.

Desai, D. A., Kotadiya, P., Makwana, N., & Patel, S. (2015). Curbing variations in packaging process through six sigma way in a large-scale food-processing industry. Journal of Industrial Engineering International, 11(1), 119–129.

Fernandes, S. E., & Jain, S. (2015). Reducing aflatoxins failures in chilli across the value Chain. IEOM 2015 - 5th International Conference on Industrial Engineering and Operations Management, Proceeding.

Fink, A. (2019). Conducting research literature reviews: From the internet to paper (Fifth edit). Sage publications, Inc.

Francisco, M. G., Canciglieri Junior, O., & Sant’Anna, Â. M. O. (2020). Design for six sigma integrated product development reference model through systematic review. International Journal of Lean Six Sigma, 11(4), 767–795.

Guo, W., Jiang, P., Xu, L., & Peng, G. (2019). Integration of value stream mapping with DMAIC for concurrent Lean-Kaizen: A case study on an air-conditioner assembly line. Advances in Mechanical Engineering, 11(2), 1–17.

Gürel, E., & Tat, M. (2017). SWOT Analysis: a theoretical review. The Journal of International Social Research, 10(51).

Hung, H. C., & Sung, M. H. (2011). Applying six sigma to manufacturing processes in the food industry to reduce quality cost. Scientific Research and Essays, 6(3), 580–591.

Hussain, M., Ajmal, M. M., Gunasekaran, A., & Khan, M. (2018). Exploration of social sustainability in healthcare supply chain. Journal of Cleaner Production, 203, 977–989.

Ibarra, J. D., Robles, A., Montemayor, A., Iñiguez, A., Blanco, A., & Torrecillas, A. (2019). A lean six sigma project to reduce waste and variability in a confectionery manufacturing. Proceedings of the International Conference on Industrial Engineering and Operations Management, 2018, 631–641.

Kambli, A., Sinha, A. A., & Srinivas, S. (2020). Improving campus dining operations using capacity and queue management: A simulation-based case study. Journal of Hospitality and Tourism Management, 43(January), 62–70.

Kehinde, T. O., Oluleye, A. E., Olaleye, K. J., & Jegede, S. L. (2019). Six sigma approach in safety management of a production firm. International Journal of Engineering Research and Technology, 12(10), 1654–1663.

Kolawole, O. A., Mishra, J. L., & Hussain, Z. (2021). Addressing food waste and loss in the Nigerian food supply chain: Use of Lean Six Sigma and Double-Loop Learning. Industrial Marketing Management, 93(May 2020), 235–249.

Kotsanopoulos, K. V., & Arvanitoyannis, I. S. (2017). The Role of Auditing, Food Safety, and Food Quality Standards in the Food Industry: A Review. Comprehensive Reviews in Food Science and Food Safety, 16(5), 760–775.

Krotov, V. (2019). Predicting the future of disruptive technologies: The method of alternative histories. Business Horizons, 62(6), 695–705.

Kumar, M. B., & Parameshwaran, R. (2020). A comprehensive model to prioritise lean tools for manufacturing industries: A fuzzy FMEA, AHP and QFD-based approach. International Journal of Services and Operations Management, 37(2), 170–196.

Laureani, A., & Antony, J. (2019). Leadership and Lean Six Sigma: a systematic literature review. Total Quality Management and Business Excellence, 30(1–2), 53–81.

Li, N., Laux, C. M., & Antony, J. (2019). How to use lean Six Sigma methodology to improve service process in higher education: A case study. International Journal of Lean Six Sigma, 10(4), 883–908.

Lobo, C. V. F., Calado, R. D., & Conceição, R. D. P. da. (2018). Evaluation of value stream mapping (VSM) applicability to the oil and gas chain processes. International Journal of Lean Six Sigma, 11(2), 309–330.

Machfud, & Atika, N. (2020). Application of six sigma method to minimize risk of rejection product: A case in cheese industry of company X. IOP Conference Series: Earth and Environmental Science, 472(1).

Maheshwar, G. (2012). Application of Six Sigma in a small food production plant of India: A case study. International Journal of Six Sigma and Competitive Advantage, 7(2–4), 168–180.

Mello, C. H. P., Turrioni, J. B., Xavier, A. F., & Campos, D. F. (2012). Pesquisa-ação na Engenharia de Produção: Proposta de Estruturação para sua Condução. Produção, 22(1), 1–13.

Miguel, P. A. C., Fleury, A., Mello, C. H. P., Nakano, D. N., Lima, E. P. de L., Turrioni, J. B., Ho, L. L., Morabito, R., Martins, R. A., Sousa, R., Costa, S. E. G., & Pureza, V. (2012). Metodologia de Pesquisa em Engenharia de Produção e Gestão de Operações (2nd ed.). Elsevier Editora Ltda.

Moher, D., Liberati, A., Tetzlaff, J., & Altman, D. G. (2009). Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. The Bmj - Research Methods and Reporting, 339(jul21 1), b2535–b2535.

Mousavi Isfahani, H., Tourani, S., & Seyedin, H. (2019). Lean management approach in hospitals: a systematic review. International Journal of Lean Six Sigma, 10(1), 161–188.

Mueller, P. S., & Cross, J. A. (2020). Factors impacting individual Six Sigma adoption. International Journal of Lean Six Sigma, 11(1), 57–83.

Muganyi, P., Madanhire, I., & Mbohwa, C. (2018). Business survival and market performance through Lean Six Sigma in the chemical manufacturing industry. International Journal of Lean Six Sigma, 10(2), 566–600.

Nandakumar, N., Saleeshya, P. G., & Harikumar, P. (2020). Bottleneck identification and process improvement by lean six sigma DMAIC methodology. IconAMMA 2018, 24, 1217–1224.

ONU. (2017). World Population Prospects: The 2017 Revision.

Paes, L. A. B., Bezerra, B. S., Deus, R. M., Jugend, D., & Battistelle, R. A. G. (2019). Organic solid waste management in a circular economy perspective – A systematic review and SWOT analysis. Journal of Cleaner Production, 239, 118086.

Parmar, P. S., & Desai, T. N. (2019). A systematic literature review on Sustainable Lean Six Sigma: Current status and future research directions. In International Journal of Lean Six Sigma (Vol. 11, Issue 3).

Patyal, V. S., Modgil, S., & Koilakuntla, M. (2020). Application of Six Sigma methodology in an Indian chemical company. International Journal of Productivity and Performance Management, 70(2), 350–375.

Pereira, A. M. H., Silva, M. R., Domingues, M. A. G., & Sá, J. C. (2019). Lean six sigma approach to improve the production process in the mould industry: A case study. Quality Innovation Prosperity, 23(3), 103–121.

Powell, D., Lundeby, S., Chabada, L., & Dreyer, H. (2017). Lean Six Sigma and environmental sustainability: the case of a Norwegian dairy producer. International Journal of Lean Six Sigma, 8(1), 53–64.

Prajapati, D., & Suman, G. (2019). Six sigma approach for neonatal jaundice patients in an Indian rural hospital – a case study. International Journal of Health Care Quality Assurance, 33(1), 36–51.

Prashar, A. (2020). Adopting Six Sigma DMAIC for environmental considerations in process industry environment. TQM Journal, 32(6), 1241–1261.

Rashidi, K., Noorizadeh, A., Kannan, D., & Cullinane, K. (2020). Applying the triple bottom line in sustainable supplier selection: A meta-review of the state-of-the-art. Journal of Cleaner Production, 269, 122001.

Rathilall, R., & Singh, S. (2018). A lean six sigma framework to enhance the competitiveness in selected automotive component manufacturing organisations. South African Journal of Economic and Management Sciences, 21(1), 1–13.

Raval, S. J., Kant, R., & Shankar, R. (2019). Benchmarking the Lean Six Sigma performance measures: a balanced score card approach. Benchmarking, 26(6), 1921–1947.

Reim, W., Parida, V., & Ortqvist, D. (2015). Product e Service Systems (PSS) business models and tactics e a systematic literature review. Journal of Cleaner Production, 97, 61–75.

Sharma, Y. K., Mangla, S. K., Patil, P. P., & Liu, S. (2019). When challenges impede the process: For circular economy-driven sustainability practices in food supply chain. Management Decision, 57(4), 995–1017.

Singh, M., & Rathi, R. (2018). A structured review of Lean Six Sigma in various industrial sectors. In International Journal of Lean Six Sigma (Vol. 10, Issue 2).

Sordan, J. E., Chakraborti, S., & Oprime, P. C. (2020). Reducing the percentage of broken drops using the lean six sigma methodology. Proceedings of the 4th ICQEM Conference, September, 650.

Srinivasan, K., Muthu, S., Devadasan, S. R., & Sugumaran, C. (2016). Six Sigma through DMAIC phases: A literature review. International Journal of Productivity and Quality Management, 17(2), 236–257.

Stanivuk, T., Gvozdenović, T., Mikuličić, J. Ž., & Lukovac, V. (2020). Application of Six Sigma model on efficient use of vehicle fleet. Symmetry, 12(5).

Ťavodová, M., Náprstková, N., Hnilicová, M., & Beňo, P. (2020). Quality Evaluation of Welding Joints by Different Methods. FME Transactions, 48(4), 816–824.

Thiollent, M. (1986). Metodologia da Pesquisa-Ação (2nd ed.). Editora Cortez. Editora Autores Associados.

Thiollent, M., & Silva, G. D. O. (2007). Metodologia de Pesquisa-ação na Área de Gestão de Problemas Ambientais. Reciis, 1(1), 93–100.

Tranfield, D., Denyer, D., & Smart, P. (2003). Towards a Methodology for Developing Evidence-Informed Management Knowledge by Means of Systematic Review*. British Journal of Management, 14, 207–222.

Uluskan, M. (2016). A comprehensive insight into the Six Sigma DMAIC toolbox. International Journal of Lean Six Sigma, 7(4), 406–429.

Uluskan, M. (2019). Design of Experiments Based Six Sigma DMAIC Application: Electrostatic Powder Coating Process. 3rd International Symposium on Multidisciplinary Studies and Innovative Technologies, ISMSIT 2019 - Proceedings.

Uluskan, M., & Oda, E. P. (2020). A thorough Six Sigma DMAIC application for household appliance manufacturing systems: Oven door-panel alignment case. TQM Journal, 32(6), 1683–1714.

Vanany, I., Hua Tan, K., Siswanto, N., Arvitrida, N. I., & Pahlawan, F. M. (2020). Halal six sigma framework for defects reduction. Journal of Islamic Marketing.

Vergara, F., Mancheno, X., Escobar-Segovia, K., & Barcia-Villacreses, K. (2019). Improvement of the calculation of the overall equipment efficiency indicator (OEE) using the six sigma methodology, in a balanced food production plant in Durán - Ecuador. Proceedings of the LACCEI International Multi-Conference for Engineering, Education and Technology, 2019-July(July 2019), 24–26.

Voss, C., Tsikriktsis, N., & Frohlich, M. (2002). Case research in operations management. International Journal of Operations & Production Management, 22(2), 195–219.

Wei, C. C., & Cheng, Y. L. (2020). Six Sigma project selection using fuzzy multiple attribute decision-making method. Total Quality Management and Business Excellence, 31(11–12), 1266–1289.

Yin, R. K. (2017). Case study research and applications: design and methods (Sixth edit). Sage publications.

Zhou, B., Wu, Y., He, H., Li, C., Tan, L., & Cao, Y. (2020). Practical application of Six Sigma management in analytical biochemistry processes in clinical settings. Journal of Clinical Laboratory Analysis, 34(1), 1–10.