What were the main solutions/ approaches implemented in the case study? How did the author justify rationally the use of these approaches and how did they connect them with the problems and their causes?

Operations Management Assessment-2022
Referring to the case study by Cabrera , Corpus , Maradiegue and Álvarez , Answer
the following questions:
1- What is the main problem facing the SME food company? Describe the analysis
followed by the authors in investigating the problem extent and implications, causes
and root cause. Describe, define, and state the purpose of the tools used in the case
study to analyze the problem and its root causes. What type of wastes can be
attributed to the disclosed problems?
2- What were the main solutions/ approaches implemented in the case study? How did
the author justify rationally the use of these approaches and how did they connect
them with the problems and their causes? Illustrate the underlying concepts, purpose
and procedures related to the SPC and Lean.
3- What were the results achieved?
4- Conduct a review of the benefits of applying Lean and SPC in any industry using
appropriate references and research publications.
5- Which is better for a company that adopts cost leadership strategy to be agile or to
implement lean? Justify your answer.

Compare and contrast the focus on reducing the cost era with the focus on quality era within the evolution stages that operations management has progressed through.