[Home](/)/[Resources](/resources)/BIS Technical Construction File IndiaDocumentation Guide # BIS Technical Construction File (TCF): Complete Documentation Guide The Technical Construction File is the evidence package that justifies your BIS CRS registration. While BIS does not review it in detail during registration, market surveillance authorities can demand it at any time. A well-structured TCF is your defense against compliance challenges. Copy Link[Share on WhatsApp](https://wa.me/?text=https%3A%2F%2Fkrono-labs.com%2Fguides%2Fbis-technical-construction-file) At a glance Mandatory sections 13 Common mistakes 6 Retention period 4+ years ## The 13 mandatory TCF sections 01 ### Cover page and product identification Product name, model number, brand, manufacturer's name and address, Indian Standard number, and R-Number (once assigned). This page serves as the document index reference. 02 ### Application form and correspondence Copy of the BIS CRS application form (Form A), fee payment receipts, and any correspondence with BIS regarding the application. Shows the official application trail. 03 ### Test report from recognized laboratory Complete test report as per the applicable Indian Standard, issued by a BIS-recognized laboratory within 90 days. Must include all test parameters, results, and lab accreditation details. 04 ### Product description and specifications Detailed technical description including functional block diagrams, circuit diagrams (if applicable), mechanical drawings, bill of materials, and rated specifications (voltage, power, dimensions). 05 ### Manufacturing process description Step-by-step manufacturing flowchart from raw materials to finished product. Include quality control checkpoints, testing stages, and identification of critical processes affecting product safety. 06 ### Quality control procedures Documentation of incoming material inspection, in-process quality checks, final product testing, and handling of non-conforming products. Include inspection checklists and acceptance criteria. 07 ### List of manufacturing and testing equipment Comprehensive inventory of production machinery and testing instruments. Include equipment identification numbers, calibration status, calibration dates, and calibration certificate references. 08 ### Quality control personnel details Names, qualifications, experience, and roles of personnel responsible for quality control. Include organizational chart showing quality reporting structure within the company. 09 ### Authorized Indian Representative appointment For foreign manufacturers: AIR appointment letter, AIR's address and contact details, and acceptance of responsibility for compliance with Indian regulations. 10 ### Declaration of conformity Manufacturer's signed declaration stating the product conforms to the applicable Indian Standard, and that the information provided is true and accurate. Must be on company letterhead. 11 ### Label artwork and marking specifications Product label designs showing Standard Mark placement, R-Number format, and any required warnings or information. Include label dimensions and material specifications. 12 ### User manual and safety instructions Complete user manual in English and/or Hindi as required. Include operating instructions, safety warnings, maintenance procedures, and troubleshooting guidance. 13 ### Change control and version history Document tracking system showing TCF version history, dates of updates, description of changes made, and approval signatures. Essential for maintaining TCF accuracy over time. ## Common TCF mistakes that cause compliance failures Test reports older than 90 days — BIS rejects stale testing Incomplete bill of materials — missing critical component details Missing calibration certificates for testing equipment Generic manufacturing descriptions not specific to the product Unsigned declaration of conformity or missing company stamp Label artwork without R-Number placeholder or wrong dimensions ## Frequently asked questions ### Does BIS review the TCF before granting registration? BIS does not conduct a detailed technical review of the TCF for CRS registration. The TCF is prepared and retained by the manufacturer for presentation during market surveillance inspections. However, BIS may request specific sections if they have queries about the application. The test report is the primary document BIS verifies. ### How long must I keep the TCF? You must maintain the TCF for the duration of the CRS registration plus two years after registration lapses. Since CRS registration is valid for 2 years, effectively you need to retain TCFs for at least 4 years from the date of registration. BIS may request the TCF at any time during this period. ### Can I update the TCF after registration? Yes, and you should update it whenever there are changes to the product, manufacturing process, or labeling. Maintain a version history log (Section 13) documenting what changed and when. Significant changes affecting product conformity may require notification to BIS or even fresh testing and registration. ### Is the TCF format standardized by BIS? BIS does not mandate a specific format for the TCF, but the 13 sections listed above represent industry best practice and cover all elements BIS inspectors typically request. Using this structure ensures you can quickly locate any document during an inspection. Our TCF Platform follows this structure. ### Do I need separate TCFs for each product model? Yes, each product model or variant with distinct specifications should have its own TCF. If you have multiple models that differ only cosmetically (same electrical design, same safety characteristics), you may combine them in one TCF with clear differentiation. When in doubt, separate TCFs are safer. **Disclaimer:** This guide describes industry-standard TCF practices for BIS CRS compliance. While BIS does not mandate a specific format, the sections described represent best practices based on regulatory requirements and market surveillance experience. 🇮🇳 India roadmap for your product Every standard, document, and test that applies — free, no account required. See your free roadmap[ Want an expert to take your product through 🇮🇳 India compliance for you? One consultant from Krono's compliance team takes your product from requirements to legal sale, with a fixed quote before any work starts. See compliance services](/services) Learn this properly In-depth course that teaches the full process, not just this one answer. [Start the course — $149](/courses/04-bis-certification-for-electronics)[Prefer to read? 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