Sigma Paper-To reduce the error in invoices billing to shorten query days and increase revenue

Attached is my sample research paper with data, analysis and brief content that needs rewriting to align to lean 6 sigma standard. On the second attachment “Applying… billing processes”, I have attached a gold standard Lean 6 sigma paper I found online. 
Writers Background:1) Demonstrated business acumen and also have experience in writing lean 6 sigma paper with analysis with 6 sigma data  in services industry preferably in oil and gas industry.2) Minimum 20 pages 
Please reach out if you need more data to support the writing.