Operator NameDescriptionTime KPressing a single key or button Skilled typist (55 wpm) Average typist (40 wpm) User unfamiliar with the keyboard Pressing.

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Presentation transcript:

Operator NameDescriptionTime KPressing a single key or button Skilled typist (55 wpm) Average typist (40 wpm) User unfamiliar with the keyboard Pressing shift or control key 0.35 (average) PP1PP1 Pointing with a mouse or other device to a target on a display Clicking the mouse or similar device HHoming hands on the keyboard or other device 0.40 DDraw a line using a mouseVariable depending on the length of line MMentally prepare to do something (e.g. make a decision) 1.35 R (t)System response time – counted only if it causes the user to wait when carrying out their task t Keystroke-level model

Dia Ver 0.97 – Task Class Diagram

Keystroke Level Model Menggambar Class “Company”, visible attributes dan operations Class “Company” menggunakan move-click methods, doubleClick- typeCharacters methods dan clickCheckBox methods. DescriptionOperatorDuration (sec) Mentally prepareM1.35 Move cursor to icon “Class” in toolboxP1.10 Click icon “Class”P1P Mentally prepareM1.35 Move cursor to stageP1.10 Click cursor to drawP1P Double-click simbol Class on stageP2P Move cursor to textbox class nameP1.10 Double-click text “class” in textboxP2P Homing hands on the keyboardH0.40 Mentally prepareM1.35 Pressing shift keyK0.35 Type “C” (good typist)K0.22 Type “o”K0.22 Type “m”K0.22 Type “p”K0.22 Type “a”K0.22 Type “n”K0.22 Type “y”K0.22 Move cursor to checkbox visible AttributeP1.10 Click checkbox visible AttributeP1P Move cursor to checkbox visible OperationsP1.10 Click checkbox visible OperationsP1P Move cursor to button “OK”P1.10 Click button “OK”P1P Total predicted time14.74