The rapid transition from traditional e-grocery services to quick commerce has created significant operational challenges, particularly in achieving short delivery windows while maintaining economic viability. This study examined the transformation of an Indonesian e-grocery company from a two-hour delivery model to a 30-minute quick-commerce model by evaluating service coverage, courier economics, and break-even conditions. The objective of this research was to determine the operational requirements and financial constraints necessary to support a sustainable quick-commerce network. A mixed-method single-firm case study was conducted using transactional data from 406,021 delivered orders between July 2024 and June 2025, supported by semi-structured interviews with operational stakeholders. The analysis applied road-network-based isochrone mapping, maximal covering location modeling, courier cost simulation, and allowable-cost analysis. The results showed that the existing seven dark stores covered only 23.1% of demand within the 30-minute delivery target, while achieving broader coverage required approximately 10–22 strategically located stores. Dedicated rider-partners improved delivery reliability compared with on-demand couriers; however, courier costs remained above the allowable margin under the current order density conditions. Break-even analysis indicated that profitability required simultaneous improvements in supplier margins, pick-and-pack productivity, and store density. This study concludes that quick-commerce sustainability depends not only on delivery speed but also on integrated decisions regarding network design, operational efficiency, and economic scalability.
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