Study reveals engineering changes remain high throughout development cycle, affecting suppliers and costs.
12 Sep 2025 | 2492 Views | By Shruti Shiraguppi
Eighty percent of Indian automobile manufacturers are experiencing vehicle launch delays caused by late-stage engineering changes, according to a study released by Vector Consulting Group, highlighting execution challenges that are straining suppliers and increasing development costs across the country's automotive sector.
The research, based on insights from 36 senior ...
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Eighty percent of Indian automobile manufacturers are experiencing vehicle launch delays caused by late-stage engineering changes, according to a study released by Vector Consulting Group, highlighting execution challenges that are straining suppliers and increasing development costs across the country's automotive sector.
The research, based on insights from 36 senior executives across two-wheeler, passenger vehicle, light commercial vehicle, and heavy commercial vehicle manufacturers and Tier-1 suppliers, found that engineering changes do not decline as expected during the development cycle.
Only 6% of surveyed original equipment manufacturers (OEMs) follow the ideal trajectory where engineering changes drop to less than 15% during pilot and preproduction phases, 8% or less at production start, and under 3% following product stabilization. A significant 81% display considerable misalignment from this pattern, with 13% showing moderate deviation.
The impact extends beyond automakers to component suppliers, with 57% of manufacturers reporting that frequent late changes force their teams into constant rework and firefighting. This has resulted in 76% facing longer project lead times, 52% struggling with on-time deliveries, 43% experiencing cost overruns, and 83% putting new technology initiatives on hold.
Quality and cost management challenges persist post-launch for automakers. Thirty-three percent report ongoing difficulties in achieving desired product quality and reliability even after launch, while 20% cite increased warranty costs and 58% highlight delays in service and dealer network launch readiness.
The study identified three primary drivers behind late engineering changes: missing or delayed manufacturing engineering inputs in early stages (60%), delayed supplier feedback (47%), and unstable design freezes (13%).
"Late-stage design changes are disrupting launches, reducing supplier capacity, and impacting India's competitiveness in the global automotive market," said Ravindra Patki, Managing Partner, Vector Consulting Group. "The study shows that the challenge is not about technology or vision, but execution, which is good news, as it can be corrected with a change in the way new product developments are handled."
Vector Consulting Group recommends shifting from milestone-driven tracking to a flow-based execution model. The study suggests earlier involvement of suppliers during the concept stage, setting work-in-progress limits to avoid overload, and structured triage of engineering changes to separate critical fixes from non-essential modifications.
The research also emphasizes the need for Tier-1 suppliers to function as co-development partners rather than execution-only vendors.
According to the findings, adopting these practices could lead to 20-30% fewer late engineering changes, a 30-50% reduction in time to launch, a 20-30% reduction in supplier response time, and overall efficiency gains of 15-25%.
The survey covered executives from two-wheeler manufacturers (27%), passenger vehicle companies (53%), light commercial vehicle makers (13%), and heavy commercial vehicle manufacturers (7%), along with their Tier-1 suppliers.