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Recent Journal Publications by COB Faculty

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Academic Journal
Supply Chain

“The value of strategic management of residential energy storage using a two-threshold control policy”

While the deployment of renewable energy sources as an alternative to fossil fuels has garnered global attention, the intermittent and unpredictable nature of renewables has spurred a growing interest in energy storage. However, effective management of energy storage is far from trivial for residential consumers owing to various compensation and pricing structures, as well as uncertainties in electricity demand and generation. In this paper, we consider a grid-connected residental consumer facing two-part time-of-use tariffs and sellback compensation. We propose an effective battery operating policy utilizing two thresholds --- a ``purchase up-to'' threshold in the off-peak period and a ``sell down-to'' threshold in the peak period. Through a full-factorial numerical experiment, we show that this simple control policy can substantially increase the value of home energy storage while performing nearly as well as battery optimization under certainty, thus leaving little room for improvement from more complex, forecast-driven approaches. From a policy perspective, our results indicate that imposing restrictions on the purchase of electricity from the grid to charge the battery is counter-productive to the adoption of this technology and the health of the grid and environment. In addition, through case studies of U.S. cities, we show that strategically managing home energy storage makes this technology significantly more attractive even in communities where it would add no value when managed passively. Furthermore, real-world implementation in a community setting validates the effectiveness and robustness of the battery management policy established in this paper, highlighting its resilience to changes in billing and compensation plans. Our findings provide valuable insights into the effective utilization of residential energy storage systems under evolving regulatory and market conditions.
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Academic Journal
Supply Chain

“Thinking Differently About Purchasing Portfolios: An Assessment of Sustainable Sourcing”

Purchasing portfolios are a well accepted part of the supply chain literature. Yet during a recent data collection effort we observed that a number of leaders in sustainable supply chain management were not organizing their purchasing portfolios in the manner suggested by Kraljic (1983). Specifically, we found evidence of organizations buying what would traditionally be leveraged commodities in a manner more suited to strategic suppliers. This manuscript describes the observed phenomena and then uses theory to try and explain our observations. The end result is a modified sustainable purchasing portfolio model.
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Academic Journal
Supply Chain

“Triads in Supply Networks: Theorizing Buyer–Supplier–Supplier Relationships”

Past studies in supply chain management have focused on dyadic relationships (e.g., buyer–supplier), as all relationships in a network begin with a dyad. However, dyads do not capture the essence of a network. We posit in this paper that triads are the fundamental building blocks of a network. To begin considering triads in supply networks, we build on two extant bodies of literature — the buyer–supplier relationship and supplier–supplier relationship literature which offer us the context of buyer–supplier–supplier triads. By doing so, we are taking the first step toward cracking the internal dynamics of triads in supply networks. To build theoretical propositions, we apply balance theory and the structural-hole concept. We identify nine triadic archetypes of buyer–supplier–supplier relationships and state key propositions that aid in decision making in supply networks.
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