G.R. No. 100736 , September 30, 1993
DYNE-SEM ELECTRONICS CORPORATION, petitioner, vs. NATIONAL LABOR RELATIONS COMMISSION and NOEMA CODERA, respondents.

FACTS

Petitioner Dyne-Sem Electronics Corporation, a manufacturer of high-technology electronic components, employed private respondent Noema Codera as a lead-bond operator. On September 17, 1988, Codera was assigned to work on “1419 Machine No. 30.” Dyne-Sem alleged that two lots of lead dice were assigned to her: Lot No. 1 (713 units, Wafer Lot 86115.01, requiring 1.0 mil gold wire) and Lot No. 2 (394 units, Wafer Lot 861155.02, requiring 1.5 mil gold wire). Codera claimed she was only assigned Lot No. 1. After completing her work, Codera prepared a time ticket indicating she had bonded 713 units of Lot No. 1 and that the machine was on “material downtime,” meaning no units were available for work.
Dyne-Sem’s supervisor, Rosalinie de Padua, discovered inconsistencies: the tracking record showed Lot No. 2 was still “for bonding,” but Codera’s time ticket indicated no work was pending. Lot No. 2 was later found hidden in the plant, with its units superficially marked as “rejects” and bonded with 1.0 mil wire instead of the required 1.5 mil wire. Dyne-Sem concluded Codera had “misprocessed” Lot No. 2, hid the units, falsified her time ticket to conceal the misprocessing, and destroyed the lot’s travel card. The company’s foreign client, Supertex, threatened to pull out its business over the incident.
Codera was asked to explain the alleged gross violations. She denied the charges, asserting she never worked on Lot No. 2. An investigation was held on October 3, 1988, where Codera, assisted by her union representative, maintained her denial. Dyne-Sem found her guilty of serious misconduct, gross negligence, and falsification of documents, and dismissed her on October 5, 1988.
Codera filed a complaint for illegal dismissal. The Labor Arbiter dismissed her complaint, finding her guilty of gross negligence and misconduct. The National Labor Relations Commission (NLRC) reversed the Labor Arbiter’s decision, ruling that Dyne-Sem failed to prove just cause for dismissal and that the investigation was not impartial. Dyne-Sem filed this certiorari petition, arguing the NLRC gravely abused its discretion.

ISSUE

Whether the NLRC gravely abused its discretion in ruling that Dyne-Sem had no just cause to terminate Noema Codera’s employment.

RULING

The Supreme Court granted the petition, reversing the NLRC decision and reinstating the Labor Arbiter’s decision. The Court held that Dyne-Sem had just cause to dismiss Codera based on substantial evidence of her misconduct and gross negligence.
The Court found that Dyne-Sem’s evidence—including sworn statements from supervisors and quality inspectors, the discovery of the hidden and misprocessed Lot No. 2 units, and the inconsistencies in Codera’s time ticket—established that Codera misprocessed Lot No. 2 by using the wrong wire, hid the units to avoid detection, and falsified her time ticket. These acts constituted serious misconduct and gross negligence, warranting dismissal under the Labor Code.
The Court rejected Codera’s claim of denial of due process, noting she was given written notice of the charges, an opportunity to explain, and a formal investigation where she was assisted by her union representative. The investigation complied with procedural requirements. The Court emphasized that in labor cases, technical rules of evidence are not strictly applied, and the Labor Arbiter may decide based on position papers and supporting documents. The NLRC’s disregard of Dyne-Sem’s evidence constituted grave abuse of discretion.
The Labor Arbiter’s decision was reinstated, affirming Codera’s dismissal as valid.