This study aims to develop a learning model of Information System Design Analysis in Vocational Education that is valid, effective and practical. Based on preliminary studies and needs analysis conducted on the Information Systems Design Analysis course, it was found that learning is not optimal. The needs analysis also found that there were privices / needs of lecturers and students who had high expectations of the learning process that were able to improve 21st century competence, i.e. This type of research is Research and Development which refers to the 4D model. The analysis technique uses the Aiken'V test, and validity uses expert testing and Focus Group Discussion (FGD). The research findings are an Entrepreneur Digitals Learning Model (ERDIS) that is equipped with model books, teaching material books, lecturer manuals and student manuals. Models and support systems meet the validity criteria, are based on research and development models and are suitable for use by experts. The results of testing the validity of the results show that all products already have the results of product validity are at a score> 0.677. The results of testing the practicality of the product according to students 82%, based on the perception of lecturers 85% means the product has a high practicality. The results of the analysis of the effectiveness of the cognitive domain showed a t-test score of 3,252> t table of 2.010 which means that Hypothesis (Ha) was accepted, the affective domain hypothesis testing showed a t-count score of 3,688> t table of 2,010 which meant that Hypothesis (Ha) at the 95% significance level . The results of research in the psychomotor domain through the evaluation of ERDIS 1 and 2 projects are in the Good category, this means that the products are valued for effectiveness

Inventory of goods is a number of finished goods, raw materials, materials in process owned by a trading company for the purpose of selling or further processing. Inventory must be well controlled so that the availability of goods is always met. This activity is very supportive in improving service to buyers. This study aims to control the supply of goods that can always be done by mobile. The system used is based on Android with QR-Code support. The system used is an Android cellphone, so that data and information in the warehouse can be accessed and controlled anywhere and anytime. The data processed is computer equipment at the Ardha Computer Store in Padang. The results of this system can control inventory very well, so that controlling goods becomes easier and faster. So that this system can be used and is very supportive in controlling the stock of goods.

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This article aims to develop an expert-based interest-based measurement model to provide an overview of the interests that can assist in decision making of vocational interest decisions in the vocational field to be on the right target. The method used by designing vocational interest measurement instrument by producing four personality types used as knowledge base is Tangible, Thinking, Flexible and Entrepreneur (TTFE) and integrated with expert system concept which makes a practical and efficient measurement model. The generated interest measurement model can help students quickly to overview the interest in decision making majors for higher education, can conduct online consultation, documentation, and can be used as a documentation file consultation portal at an institution.