In Japan, inspection of irrigation water canals has been mostly conducted manually. However, the huge demand for more regular inspections as infrastructure ages, coupled with the limited time window available for inspection, has rendered manual inspection increasingly insufficient. With shortened inspection time and reduced labor cost, automated inspection using a combination of unmanned aerial...

Railroad terminal performance directly affects network capacity and an important element of terminal efficiency is railcar inspection and repair. New technologies to automate railcar inspections can improve railroad terminal efficiency by reducing inspection times and improving operations. This research applies Lean Manufacturing methods to the railcar maintenance process and investigates poten...

This letter considersa particular class of multi-robot task allocation problems, where tasks correspond to heterogeneous routing problems defined on different areas a given environment. We present hierarchical planner that breaks down the complexity this problem into two subproblems: high-level allocating robots tasks, and low-level computing actual paths for each subteam. The uses Graph Neural...

 The paper considers an integrated production, inspection, preventive maintenance, and inventory problem and determines the optimal inspection interval, inspection frequency, and production quantity yielding the maximum unit expected profit in an imperfect production process with inspection time and reworking. When the process in an out-of-control state produces a certain percentage of non-con...

Abstract: Inspections are common activities in most preventive maintenance (PM) programs. The models for optimizing the inspection interval using the two-stage delay time have been presented by many researchers. However, the three-stage failure process introduced by Wang is closer to reality corresponding to the actual industrial applications. When the minor defective stage is identified at an ...