Technical production discrepancies cannot be taxed on conjecture when block assessment lacks reliable material and expert support.

Additions in block assessment based on excise register comparisons, burning loss, stock discrepancies and alleged suppression of production were not sustained where the assessment rested on the Assessing Officer's own verification and assumptions rather than reliable material. The Court accepted that an income-tax authority cannot assume the role of an excise authority to resolve technical production issues without expert support, particularly in a manufacturing context. It upheld the Tribunal's view that stock could not safely be matched with RG-I entries and that the conclusions were conjectural. The additions deleted by the Tribunal were therefore correctly deleted, and the remaining additions sustained by the Tribunal did not call for interference.

---

---

Issues: Whether the additions made in block assessment, based on comparison of excise registers, burning loss, stock discrepancies and alleged suppression of production, were sustainable.

Analysis: The assessment was founded largely on the Assessing Officer's own verification of manufacturing records and excise registers and on assumptions drawn from discrepancies in burning loss, stock and by-products. The Court held that an Income-tax Officer cannot assume the role of an excise authority and determine the intricacies of production without reliable material or expert assistance, particularly in a manufacturing process involving technical questions. The reasoning adopted by the Tribunal, which found that the stock position could not be safely matched with RG-I entries and that the conclusions were based on assumptions, was accepted.

Conclusion: The additions deleted by the Tribunal were rightly deleted, and the remaining additions sustained by the Tribunal were not shown to warrant interference. The assessee's challenge failed and the Revenue's challenge also failed.

---