Evaluate reuse and operating cost

ISRO reports that LEX-02 reused the winged body and flight systems from LEX-01 after the required clearances, with strengthened structure and landing gear. Its LEX-03 report then states that the LEX-02 winged body and flight systems were reused without modification. These are specific reuse histories, not a claim that every component in the program always flew unchanged.

To understand reuse, follow configuration and inspection records for an identified article. “The same design flew again” and “the same physical hardware flew again” answer different questions. A configuration change may be a useful improvement, but it should remain visible in comparisons across tests.

Consider an invented accounting model with a reusable article costing 12 million units to build and prepare initially, plus 1 million units for each use. Spread across six uses, the average is 12 ÷ 6 + 1 = 3 million units per use. Across twelve uses, the arithmetic average is 2 million. These are original teaching figures, not ISRO prices or a forecast of this program.

The example assumes the article survives the stated number of uses and the per-use cost stays fixed. It omits financing, development outside the initial figure, infrastructure and replacement hardware. A lower calculated average is meaningful only when the assumptions match the service being evaluated; adding flights to a denominator does not create demand or guarantee availability.

Follow the evidence from reuse to service

A service assessment should count inspection time, repairs, ground operations and the variation between easy and difficult turnarounds. A fast trial can demonstrate what was possible in that case. A reliable schedule requires evidence across repeated operations, with delays and maintenance included.

The dated experiments in this course establish pieces of a reusable-flight capability. They do not by themselves establish an operational orbital launcher, an October 2026 flight schedule or a measured commercial cost advantage. Keep those later claims separate until evidence covers the whole service. This preserves the importance of the experiments while making their limits understandable.