MAT 510 - Homework Assignment Homework Assignment 5 Due in Week 6 and worth 30 points The data in below table lists country code and the order to remittance (OTR) time for hardware / software installations for the last 76 installations (from first to last). OTR is the time it takes from an order being placed until the system is installed and we receive payment (remittance). Because this company does business internationally, it also notes the country of installation using a country code. This code is listed in the first column. Table: Country Code and OTR Cycle Time for Software Systems Installation Country Code 1 1 1 1 14 1 1 17 1 1 6 5 5 1 1 7 7 1 17 7 1 8 17 8 7 8 6 6 5 7 Cycle Time 20 24 46 26 38 15 15 23 31 31 64 29 44 32 15 11 14 89 41 41 36 43 21 28 18 47 26 47 9 42 Country Code 5 6 7 8 5 1 7 7 1 1 1 7 1 1 1 14 7 17 6 17 6 7 8 8 7 14 7 1 5 17 Cycle Time 29 40 157 19 24 81 53 26 28 34 34 50 52 19 44 150 29 23 79 13 32 61 42 46 88 24 7 33 129 41 MAT 510 - Homework Assignment 5 6 6 1 7 1 1 1 5 27 27 33 44 21 22 50 17 14 14 7 7 7 5 1 43 42 42 53 53 48 21 19 Use the date in table above and answer the following questions in the space provided below: 1. Does the OTR time appear to be stable? Why or why not? 2. If you were to use a control chart to evaluate stability, which chart would you use? Why? 3. What can you learn about the distribution of the installation process? 4. Does it appear that the country has an impact on installation time? Why or why not? Answers 1. Country 5, 6, 8, 14 and 17 are stable because all the data points are between the limits whereas country 1 and country 7 are unstable because the data points are outside the limits. 2. The control chart to evaluate stability was Individual & M.R. that helps in determining which chart to use. 3. Country 1 and Country 7 are special causes because they are considered to be very unstable. 4. Yes, Country 14 appears to have an impact on installation time because the cycle time is much greater than other countries. MAT 510 - Homework Assignment Hi Khalida Phases of DMAIC DEFINE: It defines the customer and their critical to quality (CTQ) issues along with core business process. It defines who the customers are, what are their requirements and expectations for the products and services (Wheeler, 2005). Project boundaries consisting of start and stop of the process along with the process which is to be improved by mapping of the process flow is also defined in this phase. MEASURE: In this step performance of the core business process is measured. It starts with development of a data collection plan for the process. Data is collected from many different sources for determining the types of defects and metrics. Last step is the comparison of the collected data with customer survey results to determine shortfall. ANALYZE: Analysis of the data collected begins and the process map for determining the root causes for an anomalies along with the opportunities for improvement (Wheeler, 2005). It begins with the identification of the gaps between the current performance and predetermined goal performance. Next steps are prioritizing the opportunities for improvement and identification of the sources of variation. IMPROVE: It includes improving the target process with the help of creative methodologies to fix and prevent problems. First step is the creation of innovative methods using technology and discipline and then developing and deployment of implementation plan. CONTROL This phase is the most important phase in the process as the new process created during the improve phase is standardized and documented , a plan is created to monitor the process and provide training about the new process created for improving the business process of an organization. Great post KhalidaPrimary goal of the DMAIC CONTROL phase is to ensure that the methodologies obtained in the improve phase are maintained even after the completion of the project. For the effective application of the new process developed, documentation and standardization of the procedures is necessary then make sure that all employees are trained to understand the new method and communication of project's result to each of them. In addition to this the project team should have a plan for mentoring the ongoing process and for reaction to any problem that arises while following the new process