the wear of the outer wire layers, which are in constant contact with the sheave during operation [3;4]. Overall, the operational reliability of a steel rope is critically linked to the mechanical properties of its individual wires. These ropes are typically exposed to complex loading conditions--such as tension, bending, torsion, and cyclic wear--which cumulatively affect their structural integrity and longevity. These loading modes act simultaneously in real-world operations, particularly in mining and lifting applications, where ropes are subjected to thousands of cycles across varying sheave diameters and winding configurations. [PERSON] et al. [5] identified the main causes of rope damage as bending fatigue, mechanical abrasion, corrosion, and overloading. The damage typically initiates at stress concentration points and progresses via sequential wire breakage, disrupting the internal stress distribution and increasing the likelihood of dynamic instability during use. Their findings underscore the importance of controlling wire-level properties--especially tensile strength--before and after the rope is woven. [PERSON] et al. [6] emphasized the safety-critical role of steel wire ropes in cranes, elevators, mining hoists, and aerial transport systems. Their high tensile strength allows them to carry substantial loads while operating over relatively small-diameter sheaves. As a result, ongoing research continues to explore improvements to the physical and mechanical properties of ropes to ensure reliability under these demanding conditions. The mechanical characteristics of rope strands including wire diameter and material strength play a decisive role in determining operational behavior. Coarser wires typically offer better resistance to abrasion, while finer wires enhance flexibility. Advanced constructions, such as compacted or plastic-filled (PVF) strands, have been shown to improve fatigue resistance by reducing internal friction and mitigating secondary bending effects [7]. Fatigue and corrosion remain the dominant degradation mechanisms limiting rope service life. [PERSON] reported that fatigue failures frequently initiate at wire contact points, with the degradation process accelerating after approximately 60,000 load cycles. He also noted that wear progression depends on the transverse contact angle between adjacent wires, which influences stress distribution [8]. [PERSON] [9] showed that rope core design and lay direction (e.g., Lang lay vs. regular lay) significantly affect fatigue resistance, with Lang lay ropes outperforming others in terms of longevity. The broad dispersion of tensile strength values, particularly in Classes III and IV, is likely a consequence of inconsistent wire sourcing and inadequate process monitoring. As shown by [PERSON] and [PERSON], such heterogeneity leads to uneven load distribution and accelerates the onset of internal fatigue, ultimately reducing operational lifespan. Nonetheless, neither [PERSON] nor [PERSON] quantified the impact of variations in tensile strength class within a single rope, which is the focal point of this study [8;9]. In terms of diagnostics, [PERSON] et al. [10] developed fusion-based signal models that improve defect detection sensitivity, particularly in complex environments where traditional wire break counting is insufficient. [PERSON] et al. [11] addressed process instability in wire rope production, identifying inconsistencies related to trimming operations in casting lines. Improvements to upstream manufacturing systems significantly reduced material waste and improved rope reliability. Their work supports the need for statistical quality control in production--but does not address the impact of dispersion in input wire properties. The current study builds on this by applying control charts and capability analysis directly to wire strength data. Ultimately, the mechanical performance of individual wires under real operating conditions governs the reliability of the entire rope system.