This thesis has analyzed the design process within the Lean Manufacturing Equipment (LME) department of Virtual Manufacturing AB. This department offers customized solutions to improve the flow, processes, and ergonomics in internal logistics and material handling. The work incorporates scientific theories within Lean, such as Just-in-Time, Kaizen, and Jidoka. Additionally, theories on lean waste were also utilized.By examining an LME-project conducted in the summer of 2023, where several problems arose, a root cause analysis was performed. This was done by first identifying the responsibilities of the designers in the LME-process. Subsequently, an Ishikawa-diagram was created, focusing on the involvement of the designers. Finally, three areas of causation were selected and analyzed more thoroughly using the "5 Whys?" Method.The result of this method provided solutions in the form of three improvement suggestions, which are: • Automated tool for wheel selection.• Standardization of categorization of Karakuri products.• Improvement of documentation for revisions.These improvement suggestions were analyzed from a Lean perspective as well as their social, economic, and environmental sustainability. / Detta examensarbete har analyserat konstruktionsprocessen inom Virtual Manufacturing AB:savdelning Lean Manufacturing Equipment (LME). Denna avdelning erbjuder kundanpassade lösningar för att förbättra flödet, processer och ergonomin inom internlogistik och materialhantering. Detta arbete omfamnar vetenskaplig teori inom Lean så som Just-in-Time, Kaizen och Jidoka. Utöver detta nyttjades även teori om lean-slöserier.Genom att undersöka ett LME-projekt som genomfördes sommaren 2023 där flertalet problem uppstod gjordes en rotorsaksanalys. Detta gjordes genom att först konstatera konstruktörernas ansvar i LME-processen. Vidare skapades ett Ishikawa-diagram som sedan avgränsades till konstruktörernas involvering. Slutligen valdes tre orsaksområden som analyserades mer noggrant med hjälp av metoden “5 Varför?”.Resultatet av denna metod gav lösningar i form av tre förbättringsförslag, vilka är:• Automatiserat hjälpmedel för val av hjul.• Standardisering av kategorisering av Karakuri-produkter.• Förbättring av dokumenteringen av revisioner.Dessa förbättringsförslag analyserades från ett lean-perspektiv samt deras sociala, ekonomiska och miljömässiga hållbarhet.

The industry 4.0 is continuously aiming to produce faster, increasing quality, and strictly using what is necessary to achieve efficiency enhancement. Within the wide list of methods used to reach this target, robot automation is usually used, although is expensive and rigid. Alternatively, a Japanese cheap automation philosophy called "Karakuri", is being introduced by Volvo GTO to manage this goal. This thesis relies on this philosophy, which takes profit of the existing energy, like gravity, to put in motion mechanisms, in order to reduce costs and improve the production efficiency by developing a semi-automated material handling system. The design method followed, the Scrum, divides the thesis in several phases of development, presenting a fully developed solution at the end of each one and iteratively increasing the level of definition along the process, to finally provide a solution suitable to be implemented.