Defects Analysis and Root Cause Robustness of Product Labels of an Acaricide Product in East Africa

This project aimed at investigating online damages of packaging materials generated during production because of imperfectness of production processes. These online damages may lead to upsurge in production cost and/or market returns, causing the company to experience losses and even damage its reputation. Data on online damages were collected for 20ml, 40ml and 100ml labels of an acaricide product for the period between July 2018 and June 2019 and statistically analyzed. Investigation was done on the causes of online damages, then corrective and preventive actions carried out. Analysis of online damages of labels of the three pack sizes revealed a loss of 1.01% on labels alone during the year under analysis. After implementing corrective and preventive actions, there was a reduction of online damages of labels.

Defects analysis of frozen fish steak processing using six sigma: a case study

Six Sigma has been utilised to analyse defects of fish steak processing at PT X located in North Jakarta. The tools of the Six Sigma implemented in the study were Define, Measure, Analyse and Improve. The observation was conducted for two months in 2020 before the company was temporarily shut down due to Covid-19 pandemic. Four defects were detected during the study, ie under size fish, softened meat, off odor and green coloration of meat, totaling 2,446 kg out of 15,080 kg of fish. Further analysis showed that the Sigma level was 3.24 with a Defect per Million Opportunities (DPMO) of 40,739. Some improvements were recommended based on cause-effect diagram.

Use of biomaterials in the surgical regenerative treatment of peri-implantitis: systematic review

The aim of this study was to review the scientific literature regarding the effectiveness of different biomaterials in the regenerative treatment of peri-implantitis. A systematic literature search was performed in PubMed/Medline, Web of Science, Science Direct, Embase, and the Cochrane Collaboration Library. Studies on the use of biomaterials in the regenerative treatment of peri-implantitis were selected. The search strategy retrieved 253 articles. After selection, six articles met all inclusion criteria and were included in the present systematic review. The studies showed that an initial therapeutic approach consisting of plaque control and implant surface decontamination and subsequent surgery for biomaterial placement were essential for the successful regenerative treatment of peri-implantitis defects. Analysis of all biomaterials used in surgical regenerative treatment showed that bovine bone grafts provided superior outcomes in terms of new bone formation compared to autogenous grafts and nanocrystalline hydroxyapatite. It is important to note that porous titanium granules have emerged as a promising biomaterial for the regenerative treatment of peri-implantitis. In conclusion, biomaterials are promising for the treatment of peri-implant bone defects and the number of in silico biomaterials that can provide treatment of excellence to patients with this condition is expected to increase in the near future.

Additive Manufacturing of AISI 420 Stainless Steel: processes validation, defects analysis and mechanical characterization in different process and post-process conditions.

Stainless steel (SS) alloys produced by Laser-based Powder Bed Fusion (LPBF) process offers comparable and sometime improved mechanical properties respect to conventionally processed materials. Some of these steels have been extensively studied in the last decade, however additively manufactured martensitic SS, as AISI 420, need further research in characterizing their post built quality and mechanical behaviour. This lack of information on martensitic SS is not consistent with their growing demand in the automotive, medical and aerospace industries due to their good corrosion resistance, high hardness and good tensile properties. Selection of the appropriate process parameters and post treatments plays a fundamental role in determining final properties. For this reason, the effect of LPBF process parameters and different heat treatments on density, defects characteristics and location, roughness and mechanical properties of AISI 420 were investigated in this paper. A first experimental campaign was carried out to establish different set of suitable process parameters for industrial applications. Starting from this result, the detected defects properties was investigated by Computed Tomography (CT) scans. Dimensions, sphericity and distributions of defects inside the volume were analysed and compared between samples manufactured with different parameters. In the second part of the paper, the influence of process and post process conditions on mechanical properties was investigated. The final presented results establish a correlation between the involved production cycle and the resulting properties of LPBF AISI 420 specimens.