In order to minimize the nuisance to users, the HKO adopts a threshold value of 60 degrees for wind direction change which have been used by air traffic controllers, airline operators and pilots in Hong Kong for many years without negative feedback.
The forecast is considered inaccurate if none of the above holds. Otherwise, the forecast is considered inaccurate. With its tropical and coastal climate, as well as its hilly terrain, winds in Hong Kong can be highly variable in speed, even in the course of a day. In order to minimize the nuisance to users, the HKO adopts a threshold value of 10 kt for wind direction change which has been used by air traffic controllers, airline operators and pilots in Hong Kong for many years without negative feedback.
In the latter case, the accuracy of visibility forecast will be used to gauge the performance of TAF in visibility reduction due to weather phenomena. In case that the largest forecast cloud layer of operational significance i. The verification of temperature forecast differs from that of forecasts of other meteorological elements in the sense that the accuracy of temperature forecast is judged for the valid period as a whole instead of on a piecewise basis.
The forecast is considered accurate for the entire forecast period if both the actual maximum temperature and the actual minimum temperature during the valid period of the TAF range within 1 degree Celsius from the forecast maximum temperature and the forecast minimum temperature, respectively. The forecast is considered accurate for half of the forecast period if either the actual maximum temperature or the actual minimum temperature but not both of them during the valid period of the TAF ranges within 1 degree Celsius from the forecast maximum temperature and the forecast minimum temperature, respectively.
The forecast is considered inaccurate for the entire forecast period otherwise. The time period should normally not exceed 2 hours but in any case should not exceed 4 hours [vide 1. The treatment takes into consideration that the fluctuations should, in the aggregate, last for a period of less than one-half of the period during which the fluctuations are forecast to occur.
To compensate for this, a penalty is imposed if the expected fluctuations are not observed. In the verification, cases of accurate forecast are counted on a time basis. For any verification period, such as a day, a month or a year, the percentage of accurate forecast is the segregate duration of accurate forecasts in minute divided by the segregate duration of forecasts that has been verified also in minutes as covered in TAFs issued during the verification period.
Accordingly, the percentage of accurate forecast for individual meteorological elements is computed based on this result and the total number of minutes of the forecast that has been verified. The illustration is based on a hypothetical TAF. Pursuant to section 2. Determination of percentage of accurate forecast Solely for the forecast precipitation in the hypothetical TAF, the percentage of accurate forecast is: total duration of verified forecast 1 minutes over total duration of accurate forecast 1 minutes in percentage, which equals Usage of Page Object Factory implementation also helps in making the tests more readable and easy write.
Hover here to see the difference Developing and Running a Keyword driven framework :- TAF have an in-built plug-n-play keyword driven framework. Once done users are good to go ahead and define their keyword based test and test-suite files excel or csv.
These test-suite files can then be executed using the DataDriven feature of TestNG using the internal utilities provided by the framework. Reporting in a Keyword Driven Framework: While implementing a Keyword driven framework the common problem is Test execution reporting.
Majority automation engineers implement their own execution and reporting framework to solve this issue. This increases complexity of the framework and hence affecting the scalability.
TAF customizes the reporting of the TestNG and the execution reports contains the actual test description of the test mentioned in the test-suite rather than some method name.
Hover here to see a sample report Driver Initialization and management:- Most of the frameworks have to handle the driver initialization and its management which may bring some complexity into execution if not properly handled. TAF have an inbuilt driver management which will provide following features:- Default driver creation based on the provided driver name ex.
Flexibility to define custom driver creation and easy plugging it into the framework. Open file, look for applicable data, iterate over data and then create a single data object to be given as input your tests.
TAF comes with a utility which will parse the file and give in return List of class objects containing the data for use of single iteration. Hover here to see an example Implementing Page Object Model:- As we all know Page Object Model is a very good model when the application is big and we have huge number of test-cases.
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