DATA

Haha_fizul
Mind Map by Haha_fizul, updated more than 1 year ago
Haha_fizul
Created by Haha_fizul over 5 years ago
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For Mabel, Adeline and Hafizul. (and those people who also wanted to do some part of data for mindmap)
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Resource summary

DATA
1 Method of Ensuring Data Correctness
1.1 Data Verification
1.1.1 (A method to check the input for errors)
1.1.1.1 Proof-Reading
1.1.1.1.1 The person entering the data simply reads through what they have entered to check it is correct or not. Usually checked with the original copy.
1.1.1.2 Double-Entry
1.1.1.2.1 The data is entered twice. The computer compares the data, and anything that doesn't match is questioned.
1.2 Data Validation (Is it logical?)
1.2.1 Presence- Check
1.2.1.1 It is a check to see if the data is entered.
1.2.1.1.1 E.G: You forgetting to type ponylover43@yahoo.com.sg in the E-mail section. Then there is a warning that says you need to type it in.
1.2.1.1.1.1 This is too basic for an answer. Better not write it as an answer.
1.2.2 Format-Check
1.2.2.1 It checks whether the data is in the correct format.
1.2.2.1.1 E..G:date should be in DD/MM/YYYY (Not like USA)
1.2.3 Check-Digit
1.2.3.1 Used for numerical data. An extra digit is added to a number which is calculated from the digits. The computer checks this calculation when data are entered
1.2.3.1.1 E.G: IDK
1.2.4 Character-Type Check
1.2.4.1 Character type check is a check to make sure only certain types of characters are in the data.
1.2.4.1.1 E.G: A name should not have numbers.
1.2.5 Range-Check
1.2.5.1 A range check is a check to make sure a number is within a certain range.
1.2.5.1.1 E.G: A driver's age should be 17 to 99.
1.2.5.1.1.1 When you fake your birthday and you still are not old enough for Facebook.
2 Data Process
2.1 Batch Processing
2.1.1 Batch processing is where the data is collected first, and then at a certain period of time, usually after a month, the data will be updated.
2.2 Real-time Process
2.2.1 Real-time Processing is where the data is collected and updated on the spot.
3 Data Collection
3.1 Open-Loop
3.1.1 Sensor
3.1.1.1 Analog to Digital Converter(ADC)
3.1.1.1.1 Computer
3.1.2 The sensor detects a change in value. Then, it will send a signal to the ADC, which will convert the signal from analog to digital for the computer to interpret. Then it will send a signal to the computer. The computer will display the signal, showing that there is a change in the value.
3.2
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