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  1. FAQ: I have a condition for events of variable duration. I would like to create a new condition that comprises the first third of the time (or 4th, or 10th) of the original condition. Solution: A stepwise approach can be taken to achieve this functionality. 1. Begin with your condition loaded in the display pane. 2. Create a new Signal using Signal from Condition that calculates the total duration of each of your event capsules, interpolated as a step signal. 3. Create a new signal that is your total event duration multiplied by the proportion of t
  2. Hey there, My question splits into two parts: Firstly, I want to create a condition based on multiple criteria: if signal A equal to 3, B equal to 4, C is greater than 5 than condition is valid. I know i could create 3 individual capsule and overlap them. Is there a simple way to use formula to do so? Secondly, in my analysis i have 10 signals and associated conditions(alert), then I want to know in the past 7 days how many alert in total(repeated instance or capsule doesnt count) ? and How long is the total alert time? Thank you
  3. Background: When looking to identify trends or step changes in a signal, we typically recommend an approach of smoothing the signal, taking the first derivative, then identifying when that derivative is positive or negative. This method works well most of the time, but employing this technique in combination with others can be more effective at capturing trends/step changes when the value change in the signal is more subtle. Solution: When looking for step changes, we can use a technique of calculating a range of the signal on a rolling periodic basis and search for when the r
  4. Background: Seeq has functions in Formula to remove outliers based on different algorithms, but sometimes it is desired to identify and remove outliers that falls outside of the interquartile range. Solution: The approach we can take to solve this data cleansing problem in Seeq is to determine the periods over which we want to calculate the quartiles, calculate new signals from the 25th and 75th percentiles during each of those periods, identify deviations from those percentiles, and remove data outside of the IQR from our original signal. 1. The first step is to decide
  5. Hello Everyone, I hope you are doing well. I need some help with creating a function. I have multiple conditions that I have created that tell me if the equipment is stopped, lag, standby, or other attributes. I want to be able to be able to: ADD Durations for when equipment is stopped and in lag OR when the equipment is stopped or standby. ADD Durations for when equipment is stopped but not in lag or standby. The example variables are in hours. Stopped ($i5) Standby($i6) Lag ($i) I would appreciate the help.
  6. FAQ: I have various conditions that I've created and I am trying to capture the minimum value of a signal during 1 condition and the maximum value of the same signal during another condition. I want these values displayed in a scorecard where the headers are the exact time stamps when the max or min value occurred. Solution: Let's take an example where we have two conditions for when a signal is increasing in value and when a signal is decreasing in value. We want to know the max ROC during the time periods when the signal is increasing, the min ROC when the signal is decreasi
  7. In many industries (pharmaceuticals, food and beverage, etc.), mean kinetic temperature (MKT) is used to measure the temperature fluctuations of a material during storage and shipment. Mean Kinetic Temperature is a non-linear weighted average temperature that is set up to provide an impact on product stability. In general, product stability follows an exponential trend with temperature as it is inherently a decomposition reaction of the desired product. Therefore, the mean kinetic temperature takes into account the exponential reaction rate to determine the average temperature weighted by the
  8. FAQ: I would like to capture the value of a signal at the exact center of each capsule within a condition. Is there a way to do this with Seeq? Solution: 1. Begin with your signal and the condition over which you want the middle value in the display pane. 2. Open a new formula window and use the getMiddles() function to create a zero length capsule at the center of each capsule within your condition of interest. $myCondition.getMiddles() Note, depending on which tool what used to create the red condition shown in your screenshot, you may need to add a max capsule
  9. Hi- I'm looking for some help. How do I calculate the total amount of time that my line is running per day? Thanks! Sam
  10. Overview This method will provide a simple visualization of externally determined control limits or help you accurately calculate new control limits for a signal. Using these limits we will also create a boundary and find excursions for how many times and for how long a signal deviates from the limits.These created signals can be used in follow-on analysis search for periods of abnormal system behavior. In this example we will be creating average, +3 Std Deviation and -3 Standard Deviation boundaries on a Temperature Signal. Setup
  11. Hi All, I'm dealing with batch data ,where in i need to get a batch duration ( which is not fixed for all the batches data). Do we have any ways to get a capsule for each of the batches duration to distinguish all the batches separately. Regards, Jitesh Vachheta
  12. FAQ: I've got a signal for which the average and standard deviation are believed to be drifting over time. When I view the average and standard deviation in calendar time, it isn't helpful because they are highly dependent upon the production grade that I am running. Is there a better way that I could be viewing my data to get a sense of the drift of the average and standard deviation by production grade over time? Solution 1: Histogram 1. Add your signal of interest and your production grade code signal to the display. 2. Create a condition for all production grades
  13. A common analytics need is to calculate changes in a signal's value over different time periods (such as hourly or daily). One example is calculating the change in a tank level signal as a way to infer flow rates, production, amount transferred, etc. While the Seeq Formula derivative() function is often useful in these situations, in some cases the user may want to simply calculate the signal change over a specified time period (perhaps once/hour). While there are many ways to do this in Seeq, two efficient ways are: 1) using the Delta statistic in Signal from Condition and 2) using $sig
  14. I have a Boolean signal and would like to count the number of events over a specified time period. How can this be accomplished in Seeq? Thanks, Sam
  15. Overview: This technique example explores two methods for assessing equipment operating conditions per unit of time (i.e. total operating hours per week in this example) using Signal from Conditions (Presented as a Bar Graph) and Histogram. The Signal from Condition approach transforms a condition into a new signal using an equation or statistical function (in this case we will use an equation and the “TotalDuration” function). The approach using the Histogram tool allows transforming a signal into a "value" domain. For example, for a given segment of time, plot the distribution of va
  16. Use Case Background In this Use case, we have 2 signals: Signal 1 and Signal 2. We'd like to use Seeq to calculate the offset (in time) of the peaks in the two signals. The following steps can be used to perform this calculation. Analysis Steps 1. Use the Value Search tool to create a condition for the peaks. 2. Use the Signal from Condition tool (twice) to calculate the maximum value of each signal during the Peaks condition. Be sure to place the timestamp of the statistic at the point of maximum value. 3. Finally, use the fol
  17. Use case: A piece of equipment has a start-up sequence in which it goes through different discrete states sequentially before completing the sequence and reaching steady state. When the equipment is off, the state is 0. When the equipment enters the start-up sequence it cycles through states 1-6 in the pattern "1-2-3-4-5-6". A successful start-up sequence will have all 6 states in the pattern "1-2-3-4-5-6." If a disruption occurs at any point in the start-up sequence the state number will read as state 7, thus a failed start-up sequence could have the pattern "1-7", "1-2-7", 1-2-3-7", etc
  18. FAQ: I want to identify the change in value of my signal after a change has occurred. My signal is generally constant (with typical noise) aside from when an event occurs during which there is a step change in the value of the signal. Solution: In order to compare the actual value of the signal before and after some event, you must first identify the event. Method 1: Running Delta. Note: an approach using the running delta function can be preferred to the derivative function (Method 2) when step changes are present as the derivative is infinite during these steps. Using the
  19. Upstream O&G Customer Use Case: I have created a condition for when my well is shut-in based on a value search on the down hole pressure. I've created another condition for the first hour after the well is shut-in. I would like to create another condition that runs from the end of my 1-hour after shut-in condition until the down hold pressure returns to within 10% of it's pre-shut-in value. Once I have isolated this period of time I would like to calculate an hourly rolling average over only that time period and do the same for my 1 hour after shut-in condition. Solution:
  20. FAQ: I've calculated a scorecard metric that I want to use in a calculation of a condition. While the scorecard metric is visible in trend view, it is not provided as a signal choice in the drop-downs on the tools or in the Seeq formula window. Can my scorecard metric be used in calculations of other signals/conditions? Answer: In the versions of Seeq currently available (R21.0.41 or earlier), the scorecard metric tool does not actually create a signal despite being able to be viewed in trend view. The signal from condition tool requires the same input arguments and produces the same outp
  21. Hi All, Suppose I have created a capsule with a trend which looks like this. a) I would like to select a capsule in these capsules and make it my "Standard Trend". b) Also I would like to find out find out which trends are NOT at least 90% of my reference trend. Basically trying to find out outlier amongst the capsules. c) Using that outlier result in an table format as (% duration out of bound/ Number of capsules which are not atleast 90% of my standard trend) etc would be my next step. Any help or direction for this path would be appreciated.
  22. This use case came up while working with a customer last week, and I thought it was worth sharing on the forum, since other users may be interested. The user I was working with was interested in creating limits for a signal. The limits would be calculated based upon the average and standard deviation of the previous 4 hours of operation; essentially the user wanted to create a rolling 4 hour boundary. We worked out the following solution: 1. Create a periodic condition for the time period that you would like to use for this rolling window. Here I created 4 hour periods:
  23. I have a condition with several capsules of various lengths; how do I determine the time period or length of each capsule? For example, my first capsule is 24 hours long, and then the next capsule is only about 3 hours. I'm looking for a way where I can get this information for all of my capsules.
  24. Hi, Referring to the given example, '$condition.transformToSamples($capsule -> sample($capsule.getStart(), $capsule.duration()), 1d)', how do I plot the starting value instead of the duration? Thank you.
  25. Hello, This might be a simple question but have not been ale to find help anywhere (Being a beginner). I would like to know how to calculate hourly avg trend of a signal which is one sec interval. What I am thinking is: Suppose signal is = $a a) Create value search for hourly capsules? b) Taking avg of during those capsules using formula search? However I would like the time range for this hourly avg to be dependent on time slider. Which means that sliding time should update the trend. Any help (Formula snippets) would be appreciated.
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