QUESTION : Develop a cause$-$and$-$effect $($Ishikawa$/$Fishbone$)$ diagram for a recurring quality issue in the production of smartphones, such as screen defects. Identify the major categories contributing to this issue, like materials, methods, machinery, and manpower, and suggest potential improvements. $[$ Provide the diagram surely and dont use AI such chatgpt and bard otherwise i will downvote and report answer $]$