Data quality

data qualityThe amount of data we have access to is overwhelming; but what data is interesting? What data is important to reach your targets? Is data quality adequate? Is data consistent with the data source? An important point when it comes to data acquisition is to use resources to ensure the quality of the data.

Companies that do not spend enough resources to assure the quality of the data might not rely on data that do not meet their expectations. It is necessary with sufficient quality control of the data to ensure compliance with the data source. If not, the data is useless. If you cannot trust the data, you are not going to use it. 

Data quality tests can be done through monitoring production over a given time; log manually all relevant events and verify that the data collection is correct. A challenge when performing data quality tests is to reveal problems that occur occasionally. 

Lean Tech has experience with quality assurance of data, including a company that logged up to half a million data per hour from different machines. There were different suppliers involved, and extensive root cause analysis was conducted to reveal the causes of unstable data collection and missing data. In such cases it is important to obtain as much information as possible about the situation that caused the instability.

Data acquisition

data collection

The amount of data we have access to is overwhelming; but what data is interesting? What data is important to reach your targets? When implementing new production lines with data acquisition, do not practice "nice to have". Spend resources to collect only the data you need.

Are you not sure what data you need? Use resources to decide. Here are some questions that might be of help;

- What are the relevant process indicators or KPI's (Key performance indicators) for manufacturing?

- What data is necessary to follow up these targets?

- What other measures will be relevant in the future? Why?

Companies implementing comprehensive data acquisition can risk production downtime due to overloaded system or failure. The rule "Make it simple" applies here as well. Lean Tech can help you define goals and measure to collect the right measures, and to ensure good data quality. 

Data visualization

data visualizationVisualization of data helps communication, understanding, evaluation and planning. If "A picture is worth a thousand words"; what is a graph worth to you?

You can use excel to visualize data, or you can use more sophisticated tools like JMP, Minitab, Modde, Sigma XL or others. Lean Tech use JMP, Minitab or SigmaXL (dependent of the customers preference) for Lean Six Sigma training.

When visualizing the data it is easier to see connections and trends between different variables and data sets. Visualization of data also makes it easier to identify outliers in your data set and investigate these data. This is useful when controlling the quality of your data.  

Multivariable analysis shows the correlation between various factors. Are there a correlation between factors? Positive or negative correlation? Linear or non-linear? Can the correlation be explained?

If you have data set you would like to analyze for trends and correlation you can contact Lean Tech.

 

References

  • value stream mapping"I was very impressed with Sissel's Lean Six Sigma knowledge. She makes it easy to identify improvements and create results"
    - Daryl Powell, Lean Manager, Kongsberg Maritime SubseaValue stream mapping
  • Lean engineering"Sissel has worked as part of Cambis project team for two of our projects. Her main focus has been on process design, engineering and procurement. Sissel has proven herself as a competent and committed employee. She has been an important contributor to make good progress in the projects she has worked with. At the same time she is accurate and has good quality of the work she performs."
    - Eivind Willoch, Project Manager, Cambi AS lean engineering
  • benchmarking"We are very happy with the work carried out. We was not very clear what the order was, but with your background and expertise the outcome was what we were looking for and a document we will benefit from in the future"
    - Roger Søråsdekkan, Site Leader at Allnex, Norwaybenchmarking
  • monitoring program"We hired Lean Tech to develop monitoring program for air emission. The monitoring program should satisfy requirements from the Norwegian Environment Agency including sampling frequency to ensure representative samples, uncertainty estimates, calculations and preparation of reporting templates, etc. The assignment was delivered with the correct content at the right time. Recommended." monitoring program
    - Kjell Even Misfjord, SHE manager at Allnex, Norway  
  • monitoring program"Sissels ability to quickly understand the issue, as well as her commitment and expertise is impressive. Her analytical and thorough contribution to our monitoring program has been precise and targeted, and very educational. " monitoring program
    - Thomas Løvik, HSEQ advisor at TWMA, Norway