<![CDATA[Quality control in the chemical industry requires accurate and timely recording of process parameters. At PT Multi Nitrotama Kimia, laboratory results from three production plants—the Ammonium Nitrate Plant, Nitric Acid Plant, and Utility Plant—were recorded on paper logsheets and compiled in separate spreadsheets. This practice increased transcription errors, delayed report circulation, and provided no automatic warnings for parameters exceeding specified limits. This study aims to develop ANLAB, a web-based Laboratory Analysis Information System. The system was developed using the Waterfall model, PHP, CodeIgniter 3, and MySQL. Data were collected through observations, interviews with analysts, Distributed Control System (DCS) operators and supervisors, and document reviews. ANLAB features digital forms that classify results as normal, above, or below limits; a three-tier approval workflow; additional check requests; plant shutdown tagging; role-based access control; and PDF and Excel report exports. Black box testing involving 27 scenarios confirmed that all tested functions produced the expected results. However, testing focused exclusively on functionality; time savings, error reduction, and paperless performance were not measured. Future evaluations should assess these indicators using system timestamps. The findings indicate that ANLAB provides a structured and traceable digital workflow for laboratory data management in chemical plant operations]]>
