Delivery of a scientific oration by Dr. Anindya Rachma Dwicahyani ST MT at the Open Doctoral Promotion Session at the Department of Systems and Industrial Engineering, ITS

ITS Campus, ITS News – The challenges facing industry are not just about profits, but also strategies to reduce waste and environmental impact. To address this, Dr. Anindya Rachma Dwicahyani, ST, MT, a doctoral graduate of the Department of Industrial and Systems Engineering (DTSI) at the Sepuluh Nopember Institute of Technology (ITS), has developed an innovative inventory optimization model within a closed supply chain system.

Anindya highlighted the complexity of post-consumer product management in the apparel industry, which is known to generate significant waste. This management requires close coordination across stakeholders, from suppliers and manufacturers to retailers. “The challenge is creating a sustainable recovery process that is also healthy for business,” she explained in a recent presentation at her doctoral promotion open defense.

Dr. Anindya Rachma Dwicahyani ST MT (standing left) while presenting the results of her research at ICIMECE 2023

To address this challenge, Anindya developed a model that integrates three recovery pathways simultaneously: product recovery, material recycling, and energy recovery. This multi-recovery approach offers more realistic flexibility than conventional models that focus on only one pathway. “This model is designed to mimic real-world market conditions,” explained the lecturer at the Adhi Tama Institute of Technology Surabaya (ITATS).

Beyond supply chain structure, the Surakarta-based doctor’s innovation model also takes into account dynamic consumer behavior. Factors such as buy-back prices for used products and the level of green advertising have been shown to significantly influence the number of products returned to the recycling system.

Dr. Anindya Rachma Dwicahyani ST MT while presenting her dissertation for her doctoral graduation from the Department of Systems and Industrial Engineering, ITS

Anindya’s analysis shows that a centralized decision-making structure can generate the highest combined profits for all parties in the supply chain. However, this approach can leave retailers at a disadvantage. To balance this, he proposes a cost-sharing scheme. “In this mechanism, advertising costs and post-consumer product collection are shared proportionally,” he added.

Another equally interesting finding from Anindya is the role of energy recovery. According to her, as the cost of recycling materials increases, energy recovery has proven to be a backup option that maintains system sustainability. “Converting waste to energy can support system resilience during unfavorable market conditions,” said the 1994-born woman.

Anindya’s innovation aligns with Sustainable Development Goals (SDGs) point 12, which concerns responsible consumption and production. Going forward, Anindya hopes this model can foster a sustainable supply chain that consumes less energy. “Hopefully, this model will help companies make strategic decisions to increase profits while considering ecological aspects,” he concluded hopefully. (ITS Public Relations)

Reporter: Naurah Fitri
Translator : Devinka Mutianeira