How can public–private partnership models in defence shipbuilding address capacity constraints in Indian shipyards?

India's naval expansion has long been held back by the capacity of its Defence PSU (DPSU) shipyards. The CAG found that the lead warships of major projects were 4–5 years late because of late drawings, steel shortages and inadequate shipyard infrastructure [1]. Public–private partnership (PPP) turns this scarcity into shared, parallel capacity.

Capacity constraints in DPSU yards

• Infrastructure bottleneck: MDL's limited facilities alone delayed two P15A destroyers by about a year each [1].
• Schedule slippage: GRSE's first Anti-Submarine Warfare Shallow Water Craft (ASW SWC) was due within 42 months of the April 2019 contract [2]. It was delivered only in May 2025 [3].
• Weak contract control: contracts were often signed after construction had begun, which weakened control over cost and time [1].

How PPP addresses them

• Parallel build lines: GRSE builds four ASW SWCs at Kolkata and has sub-contracted four to L&T Kattupalli for hull and part outfitting [4]. This adds slipways without new public capital.
• Proof of concept: INS Arnala, built under the GRSE–L&T partnership, was commissioned in June 2025. PIB called this PPP model the first of its kind [5].
• Splitting orders across yards: the 16-craft class is split between GRSE and Cochin Shipyard [6], so a slip at one yard does not stall the whole programme.
• Faster series output: once the first ship was done, GRSE delivered four ships within about 11 months [3][7]. Shared learning shortens build cycles, as with frigate Dunagiri: 80 months vs 93 for the first of its class [8].
• Policy endorsement: the CAG itself urged the MoD to stop relying only on DPSU yards and to bring in capable private shipbuilders [1].

Making PPP work

• Freeze designs before steel cutting so that changes do not cascade across partner yards.
• Milestone-linked payments and clear liability rules across the prime contractor and sub-contractor.
• Assured order flow so that private yards can invest in docks, skills and MSME supplier networks.

PPP lets India use idle private capacity, run builds in parallel and spread learning, which tackles the infrastructure and scheduling gaps the CAG identified. With frozen designs, tighter contracts and steady orders, the GRSE–L&T model can grow into a durable shipbuilding ecosystem that delivers Aatmanirbhar Bharat and a credible maritime posture in the Indian Ocean Region.