In this thesis, we investigated invoicing and the disadvantages that werepresent if e-commerce is not used. We have analyzed current issuance pro-cess used by the company, and then based on the information gathered, weconceived a new one. When designing it, we made use of use case diagrams,where we could predict how people would interect with said process. Aftera successful analysis, we started with the implementation, and after the endof it, we analyzed new procedure if it met the needs. In case of unsuccess-ful analysis we the re-planned the whole process upgrade and repeated saidsteps. After several upgrades, we had a final process that resolves missingdeficiency on the previous one, is automated and built for long-term use.
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