Assessment in the visual arts is subjective in nature thereby raising a concern of how to effectively assess achievements in the subject. Quality assessment of artworks is highly dependent on accurate and reliable measurement. The objective of the paper was to construct and assess the reliability and validity of a scoring rubric for grading graphic design artefacts. The paper reports measure taken to ensure validity of the developed rubric. The reliability of the rubric was also investigated using Intraclass correlation coefficient (ICC). Findings indicate that the developed rubric show evidence of high reliability with an inter-rater correlation coefficient of 0.790 and intra-rater correlation coefficient of 0.828 which are within the very reliable range. It was concluded that the developed rubric was reliable. This conclusion has far reaching implications for the development and use of rubrics in assessment bearing in mind that subjectivity in the use of rubrics cannot be completely removed.