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XYZ is a manufacturing company engaged in steel pipe production. In the production process of non-American Petroleum Institute (API) steel pipes, the company still experiences various types of waste, resulting in an inefficient production process. The identified wastes include defects, waiting, transportation, and non-value-added activities, which contribute to increased production time and reduced productivity. This study aims to analyze the major wastes occurring in the non-API steel pipe production process and propose improvements using the Lean Manufacturing approach. The methods employed in this study include Value Stream Mapping (VSM), Value Stream Analysis Tools (VALSAT), Process Activity Mapping (PAM), and Failure Mode and Effect Analysis (FMEA). Data were collected through direct observation, interviews, and documentation of the production process. The results indicate that the dominant wastes affecting the production process are defects, waiting, and transportation. PAM analysis shows that non-value-added activities remain relatively high, leading to production time inefficiencies. Based on the FMEA results, the main causes of waste are machine conditions, work methods, and operator skills. Proposed improvements include periodic machine maintenance, production quality control, work method improvement, and the optimization of material flow.

The problem of household waste in Kalanganyar Village, Sedati District, Sidoarjo Regency, is increasing along with population growth, while residents' knowledge about waste sorting is still minimal and processing facilities are limited. This community service program aims to increase awareness and cleanliving behavior through education and mentoring on household waste processing based on the 3R concept (Reduce, Reuse, Recycle). This activity adopts an Asset-Based Community Development (ABCD) approach that focuses on mapping and utilizing local potential, such as health cadres, youth organizations, the spirit of mutual cooperation, and the availability of potential land. The implementation methods include appreciative inquiry, focus group discussions (FGDs), in-depth interviews with the Head of the Sopo Nyongko TPS and community leaders, participatory observation, and practical mentoring for housewives, youth organizations, and TPS managers on February 9. The results of the activity showed an increase in residents' understanding of PHBS and waste management, indicated by the enthusiasm of participants during the educational session. The program also successfully activated local agents of change: youth groups began implementing inorganic waste recycling, and health cadres designed a home-based waste sorting system.

This study aims to identify and minimize waste in the process of procuring Food & Beverage raw materials at Hotel PXY Jasa Bali using the Lean Inventory Management approach. Observations over one month showed that the total procurement cost reached 47% of the total revenue, exceeding the ideal limit of 35%. One of the main causes is the inefficient and lack of synchronization between divisions in the Rhapsody platform, which causes waste in the form of defects, delays, over-processing, and transportation. This study uses the Value Stream Mapping (VSM) method to map actual conditions and Process Activity Mapping (PAM) to identify the type of activity based on the waste category. In addition, root cause analysis is carried out using the Root Cause Analysis (RCA) approach. The mapping results showed that out of the total lead time of 598.44 minutes, only 278.49 minutes or 46.54% were value-added activities. This finding indicates that the procurement process is not yet efficient and needs optimization. Several recommendations were given to minimize waste, such as clearer division of tasks, improved communication with vendors, and the procurement of supporting facilities to reduce physical movement between divisions. The implementation of this lean service is expected to be able to increase the efficiency of the logistics process and reduce the company's overall operational costs.