Examine the DRDO–DPSU model of indigenous weapons development with reference to systems such as the Varunastra torpedo. What bottlenecks persist?

In the DRDO–DPSU model, a DRDO laboratory designs a weapon and a Defence Public Sector Undertaking produces it. Varunastra is a ship-launched heavy-weight anti-submarine torpedo. NSTL, Visakhapatnam designed it and Bharat Dynamics Limited (BDL) builds it. In October 2026 it won a ₹1,543-crore order [1]. The case shows that the model can deliver, but slowly.

Strengths of the model

• Lab-to-line pipeline: NSTL handles design and BDL manufactures the torpedo at its Visakhapatnam unit. The first production torpedo was delivered in November 2020 [2].
• User validation: The Navy carried out a combat trial in June 2023, which confirmed the torpedo works in operation [3].
• Economic gains: The whole ₹4,106-crore package (Varunastra plus the GSAT-7C satellite) went to Indian PSUs. This saves foreign exchange and keeps skills in India [1].
• Scale and policy fit: Repeat orders let BDL produce at scale. They also match the indigenisation push of the Defence Acquisition Procedure 2020 and Aatmanirbhar Bharat.

Persisting bottlenecks

• Long gestation: The project was sanctioned in August 2002 for just ₹48.50 crore [4]. It was handed to the Navy in 2016 [5]. The large repeat order came only in 2026, about 24 years after sanction.
• Shifting user requirements: CAG found that changes in the Navy's requirements forced redesign and cost about three years [4].
• Weak lab–factory link: CAG also flagged late design documents and delays in choosing the production agency and in running trials [4].
• Systemic delays: The Standing Committee on Defence (2014–15) asked the Ministry for project-wise reasons for long supply delays [6]. Varunastra is part of a wider pattern.
• Partial self-reliance: The current order covers only ship-launched torpedoes [1]. Self-reliance across all heavy-weight torpedoes is not yet achieved.

Way forward

• The Navy should freeze specifications early and allow changes only through a formal review.
• The production agency should be involved from the design stage (concurrent engineering).
• MoD should report contract-wise delivery performance to Parliament.

Varunastra shows that the DRDO–DPSU model can turn Indian design into a weapon the fleet actually uses. Its 24-year timeline also shows how management failures waste time. With fixed requirements, early industry involvement and parliamentary oversight, the model can deliver self-reliance on time and strengthen India's security in the Indian Ocean Region.