MDL delivered the first ship of P-15B in 2021 followed by the second in 2022. The third ship, christened ‘Imphal’ is currently undergoing sea trials and MDL is set to deliver the third ship of P-15B in September-October of 2023, this is 4-5 months before the contracted date. The fourth and last ship of the class, christened ‘Surat’ is scheduled to be delivered in the middle of next year (2024).
It's not just that. The user changes the requirements in the middle of construction which causes even more dealy. This was the case with P-17A.Made a comment on DFI on the productivity of the Indian Proejcts:
~10 years to deliver 4 Project-15B vessels.
~11 years to deliver 7 Project-17A vessels.
Efficiency and productivity is increasing with time.
P15B faced delays due to Covid-19 also.
It is still not the same level as EU and Asian players, but we are improving a lot with time.