Sustainable development can save more materials and protect the environment. At the same time, the manufacturing speed of products is improved. To put this strategy into practice, we set out to estimate the time it would take to develop micromouse and the time it would take to build the website. To complete the micromouse, we need to assemble the model, test the circuit, create the shell, and finally test the micromouse. We made rough estimates of how long they would take, such as one month to assemble the model, two months to test and complete the circuit and create the shell, and two weeks to test the micromouse. We allocate time for each task and the projects that everyone is good at, which allows us to complete tasks more efficiently. It is the benefit of sustainable development. Then, we estimated the time to build the website based on the estimated time to complete the micromouse. It takes approximately one week after the assigned project to complete the design of the website. We also assumed each person’s hours and wages, and we assumed each person worked 120 hours and was paid £10 an hour. It allows us to calculate the costs for our team better.