Before revision:  However, developing a systematic analytics approach for production planning is often challenging due to the large volume of production data, the complex dependence between products, and unexpected changes in the market demand, material supplies and the production process . Previous studies only provide summarized results and fail to show details for comparative analysis of production plans.
After revision:  However, developing a systematic analytics approach for production planning is often challenging due to the large volume of production data, the complex dependence between products, and unexpected changes in the market and the plant . Previous studies only provide summarized results and fail to show details for comparative analysis of production plans.