AccScience Publishing / SCMR / Online First / DOI: 10.36922/SCMR026300021
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ORIGINAL RESEARCH ARTICLE

Endogenous inspection reliability and secondary market pricing in a smart production system with speed-dependent defect generation under carbon-regulated energy use

Janardan Behera1* ,  Suvasmita Swain1 ,  Sudhir Kumar Sahu1 ,  Bidyadhara Bishi2
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1 Department of Statistics, Ravenshaw University, Cuttack, Odisha , India
2 Department of Statistics, School of Applied Sciences, Central University of Odisha, Koraput, Odisha , India
Received: 24 July 2026 | Revised: 26 August 2026 | Accepted: 15 September 2026 | Published online: 19 October 2026
© 2026 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

Machine-based inspection is often modeled as either imperfect manual inspection or perfect automated inspection, with automation investment treated as a linear cost that leads to boundary solutions. Such assumptions overlook the realities of smart manufacturing, where inspection accuracy improves gradually with investment, production beyond design capacity increases defect generation, and inspection systems consume energy that contributes to carbon emissions. This paper develops a single-stage smart production model in which Type I and Type II inspection errors decrease hyperbolically with autonomation investment, while the defective rate increases quadratically when production exceeds design capacity. Defective items are reworked and sold through a secondary market that competes with the primary market via cross-price substitution. Energy consumption from production, inspection, and rework is converted into carbon emissions and taxed. The resulting profit maximization problem, subject to budget, storage, and market-clearing constraints, is solved using Karush–Kuhn–Tucker conditions, establishing the existence of a unique interior optimum for automation investment. Numerical experiments based on an electronics manufacturing case, supported by multiple defective-rate distributions, scenario analysis, sensitivity experiments, robustness checks, and Monte Carlo demand simulations, demonstrate that realistic inspection modeling substantially improves operational decisions and profitability while highlighting the economic value of optimal automation investment under carbon-aware manufacturing environments.

Graphical abstract
Keywords
Smart production
Autonomation
Inspection errors
Market segmentation
Carbon pricing
Karush–Kuhn–Tucker optimization
Funding
None.
Conflict of interest
The authors declare they have no competing interests.
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