MicrobialEnumerationTAMCTYMCQualityChecker

Microbial Enumeration (TAMC/TYMC)

LabEx laboratory QC CSV→JSON URS & FS microbiology utilities / cleanroom
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Microbial Enumeration (TAMC/TYMC) Quality Checker — Control of Microbiological Quality

ℹ️  Utility checks compliance of microbiological parameters with USP <61> / Ph. Eur. 2.6.12 requirements:
   • TAMC (Total Aerobic Microbial Count): ≤ specified limit (e.g., 10², 10³ CFU/g)
   • TYMC (Total Yeast and Mold Count): ≤ specified limit (e.g., 10² CFU/g)

⚠️  CRITICAL: Exceeding limits indicates insufficient preservative efficacy or hygiene breach in manufacturing!
   Product with exceeded limits is considered microbiologically contaminated.

Usage:
 MicrobialEnumerationTAMCTYMCQualityChecker.exe                            → demo mode (console output)
 MicrobialEnumerationTAMCTYMCQualityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,TAMC_CFU,TYMC_CFU,TAMC_Limit,TYMC_Limit

Example:
 MICRO-NON-2026-001,50,10,100,100

— WHY IS THIS NEEDED?
Control of microbiological quality of non-sterile dosage forms is mandatory for patient safety.
• TAMC assesses total bacterial load.
• TYMC assesses fungal contamination (yeasts and molds).
• Limits depend on route of administration (oral, topical, rectal) and product composition.
• USP <61> and Ph. Eur. 2.6.12 regulate plating methods (plate count, membrane filtration) and incubation.
• Automation eliminates manual comparison errors with acceptance criteria tables.

⚠️  CRITICAL:
• Results are expressed in CFU/g or CFU/mL.
• If no growth, result is recorded as <10 or <1 (depending on dilution).
• If growth exceeds limits, test for specified microorganisms (USP <62>) is performed.
• Method suitability test (validation) is required before batch analysis.

Key features:
• Verification of TAMC and TYMC compliance with specified limits.
• Support for different product categories (different limits).
• Generation of PASS/FAIL status for QC reports.

Critical parameters:
• TAMC: <= Limit (e.g., 100, 1000, 10000 CFU/g)
• TYMC: <= Limit (e.g., 100, 1000 CFU/g)

💡 Usage tips:
1. Ensure plates were incubated for correct time (TAMC: 3-5 days, TYMC: 5-7 days).
2. Use media that neutralizes antimicrobial activity of the product (if applicable).
3. For products with low expected bioburden, use membrane filtration method.
4. Regularly perform method validation (Growth Promotion Test).
5. Consider re-testing for borderline results.

⚠️ Note: This test is quantitative. Qualitative absence of specific pathogens (E. coli, Salmonella, etc.) is checked by a separate test (Tests for Specified Microorganisms, USP <62>).

input.csv

BatchNumber,TAMC_CFU,TYMC_CFU,TAMC_Limit,TYMC_Limit
MICRO-NON-2026-001,50,10,100,100
MICRO-NON-2026-002,120,40,100,100
MICRO-NON-2026-003,800,90,1000,100

URS & FS — Microbial Enumeration (TAMC/TYMC)

This document describes the user requirements and functional specification for MicrobialEnumerationTAMCTYMCQualityChecker. The utility is intended for QC laboratory use as a rule-based check of data prepared from an instrument, LIMS, ELN, MES or an approved input.csv.

URS — User Requirements Specification

IDRequirementCriticalityAcceptance criterion
URS-001The utility shall accept input.csv with approved columns: BatchNumber, TAMC_CFU, TYMC_CFU, TAMC_Limit, TYMC_Limit.HighThe CSV file is processed without manual header editing.
URS-002The utility shall perform deterministic evaluation for “Microbial Enumeration (TAMC/TYMC)” without machine learning.HighThe same input data produce the same JSON result.
URS-003The utility shall validate mandatory fields, numeric formats, flags, ranges and domain plausibility.HighSchema and conversion errors are explicitly reported.
URS-004The utility shall generate output.json with PASS / WARNING / FAIL statuses, source values, warnings and failures.HighThe JSON result is suitable for review, deviation investigation and integration.
URS-005The documentation shall support IQ/OQ/PQ or CSV/CSA verification.MediumURS/FS, CSV/JSON contract and test scenarios are supplied with the utility.

input.csv contract

#FieldSamplePurpose
1BatchNumberMICRO-NON-2026-001Input parameter for deterministic QC evaluation.
2TAMC_CFU50Input parameter for deterministic QC evaluation.
3TYMC_CFU10Input parameter for deterministic QC evaluation.
4TAMC_Limit100Input parameter for deterministic QC evaluation.
5TYMC_Limit100Input parameter for deterministic QC evaluation.

FS — Functional Specification

IDFunctionImplementation
FS-001CSV importRead input.csv; validate header, column count and encoding.
FS-002Schema validationCheck required fields and permitted input values.
FS-003Rule engineApply domain rules, limits and system suitability/specification checks described in the source utility description.
FS-004Status aggregationProduce final status: FAIL for critical failure, WARNING for non-critical deviation, PASS for conformance.
FS-005JSON exportWrite machine-readable output.json for LIMS/ELN/MES and QA/QC review.

OQ/PQ scenarios

  • OQ-001: a valid sample row shall be processed without schema error.
  • OQ-002: a missing mandatory column shall produce a schema error.
  • OQ-003: a non-numeric value in a numeric field shall produce a conversion error.
  • OQ-004: a critical parameter outside the limit shall produce FAIL or a critical finding.
  • PQ-001: user real batches shall be checked with retention of input.csv, output.json, utility version and checksum.

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