Bank Deposits: A Black Belt Case Study

Bank Deposits: A Black Belt Case Study

In early 2000, dot-coms were all the rage. Any idea even remotely related to the ability to transact online was immediately funded. Consequently, many decisions were made quickly and without supporting data. And many of these decisions were made in error – but could Six Sigma have made a difference? This case study will review how a Black Belt entered a dot-com transactional business, reviewed a process and came to his own conclusions about process performance.

Case Study: Online Banking

The Black Belt began working at an online bank, and his first project involved the process of how deposits were made to this bank. Since it was an online bank, there were no branches for customers to use. Instead, deposits were mailed using the United States Postal Service (USPS). Savings resulting from the lack of branches and tellers were passed along to the customer in the form of higher rates, free services, etc.

Customer focus groups and surveys indicated that the process of making a deposit is of critical importance to a customer. The process from the customer’s viewpoint is very straightforward – they sign a check, fill out a deposit slip and mail both to the bank. Deposits were the second largest driver of inquiries to the customer call center (13 percent of all calls). Customers expressed frustration in mailing delays and couldn’t understand why their checks took so long to post to their account.

The Deposit Process

The bank’s mission was to receive the deposits as quickly as possible and begin the deposit and check clearing cycle. When the bank originally set up the processes, a decision was made to establish ‘local’ deposit locations around the United States. These local deposit locations received the deposits and overnight express reshipped them to a central processing location daily.

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This local receipt and express reshipment to a central location was done for two main reasons:

  1. A deposit being mailed to a local location would take less time than mailing to a centralized, national location.
  2. Customer input indicated that mailing within a state or to a neighboring state would make customers more comfortable than mailing to a centralized, national location somewhere across the United States.

The DMAIC Project

The Black Belt hit the ground running on his DMAIC (Define, Measure, Analyze, Improve, Control) project. A project charter was created identifying exactly what the process entailed. The business case was written, the problem statement crafted and the scope clearly identified. The team was formed and quickly moved into the measurement phase. Data surrounding the deposits was collected and the analyze phase began to yield some alarming results.

Intuition led the leaders of the business to set up a system that locally collected deposits for express reshipment to a centralized, national location for processing. How could mailing to a centralized, national location be quicker than mailing locally and express reshipping? Why would customers not feel more comfortable mailing locally than to a centralized, national location?

Data and Root Causes

Data collection, however, revealed a few flaws that were not originally identified: The express reshipment process was manual. Manual processes that are not reinforced daily and that do not have adequate control plans tend to break down. That is exactly what occurred with the local deposit locations. Some locations would not receive deposits on a daily basis. When deposits were received, they sometimes would not be express reshipped that night because of a lack of engrained process.

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For deposits that were received during the week, the express reshipment process functioned properly. On the weekend, however, express reshipment wasn’t possible, so deposits arriving on Saturday were not express reshipped until Monday evening.

Because of USPS processes, some deposit mailings to local deposit locations took as long as three days. Tack on a weekend stay for the above-listed bullet, and a deposit made via mail to a “local” deposit location may take longer than five days just to be received by the bank.

Additional Findings

An additional analysis of deposits made to a local deposit location with express reshipment to a national location versus mailing directly to a centralized, national location yielded the following results:

  • The local process operates at a 2.1 sigma level, while the centralized, national process operates at a 2.5 sigma.
  • A 2 sample t-test indicated that there is a statistically significant difference between the two process means (p=0.0013).
  • The centralized, national process is faster (2.6 average days) than the local express reshipment process (4.6 average days).
  • An additional survey conducted with focus groups indicated that the deposit mailing location is not a significant factor for a majority of respondents. As an aside, the original data indicating that customers were more comfortable mailing deposits within their state could not be found.
  • A benchmarking analysis of direct competitors indicated that all utilized a centralized, national deposit process.

Project Conclusions

It did not take further data collection to convince the leaders of the business to modify their deposit process and move to a centralized, national process. The facts spoke for themselves. Cost savings resulting from only printing one address envelopes (instead of numerous local), reduced overhead associated with processing, fewer customer inquiry calls and investigations, and a more stable process resulted in savings of $4 million per year. Not bad for a six month Black Belt project.

Comments 9

  1. Tom Chang

    This was an interesting read to me as I am a BB working in the banking industry. The dates have been removed from this article but it must have been a few years ago, since if I were working this effort a solution to certainly have considered is the check deposit app where members can just take and upload a photo of their checks for deposits, without any mailing. Amazing how technology can trump even the leanest process.

  2. Ramlaxman S

    Wonderful case study. Well written and detailed the bb project implementation. Proud to read this success story.
    Thanks for sharing.

  3. Fred Nongus

    I, too, was a BB, MBB, & QL at one time but am now in an executive leadership role. Although a great framework, this is a classic example of why business leaders grow frustrated with Six Sigma. Taking 6 months to do a project is a tough putt if for no other reason than the business changes. My only 2 cents is that Six Sigma project cycle times are far too long oftentimes.

  4. Indresh

    Few Queries
    – Why did we not analyse the call centre data to find out which process has more complaints the central or local one?
    – What was the problem statement and how was the MSA done?
    – Am pretty sure after working in service industry for over a decade that the data on delivery TAT was skewed and not normal. Why did we chose to use a t- test to find the difference and why we are using averages ?


    this topic is very interesting where i can understand DMAIC Project and process of six sigma.
    am a fresher in six sigma green belt and i would like to continue to learn about the project and continous procees

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