SuccessfiedThe Successfied Score™ is one number from 0 to 1000 that tracks your progress on an exam paper. The formula is public and deterministic: the same results always give the same Score, and you can check it yourself.
The formula
Score = round(1000 × (0.55·A + 0.15·S + 0.15·C + 0.15·K))
Each of A, S, C and K is a number between 0 and 1.
A: accuracy-adjusted performance (55%)
Take your last 5 full-length mocks on this paper (full mocks, PYQ mocks and Live mocks). Each mock counts once — your first attempt at it — so re-taking a mock you've already seen doesn't raise your Score. For each one, work out your net score %: your marks after negative marking ÷ the maximum marks. A negative total counts as 0. A is the recency-weighted average of these, with weights 5, 4, 3, 2, 1 from newest to oldest, so your latest mock counts five times as much as the fifth-latest. With fewer than 5 mocks, only the weights you need (5, 4, 3…) are used.
S: pace (15%)
For each of those mocks, pace = min(1, expected time ÷ your actual time), counting only the questions you answered. S is the same 5-4-3-2-1 weighted average. Finishing within the expected time gives the full 1; going faster adds nothing, so there is no reason to rush.
C: consistency (15%)
C = 1 − min(1, standard deviation of your net score % ÷ 0.20), over the same last 5 mocks. No spread at all gives C = 1; a spread of 20 percentage points or more gives C = 0. C needs at least 3 mocks; until then it is set to 0.5.
K: coverage (15%)
The share of this paper's syllabus topics (from our blueprint of the official syllabus) in which you have answered at least 5 questions, in any test you took while logged in, including topic quizzes and the Daily Sprint.
Provisional
Until you have 3 full-length mocks, your Score is marked provisional: it rests on too few results to be steady.
A worked example
Say you have taken five full mocks on a paper:
| Mock (newest first) | Net score % | Weight | Pace |
|---|---|---|---|
| 1 | 61% | 5 | 0.90 |
| 2 | 57% | 4 | 0.90 |
| 3 | 55% | 3 | 0.80 |
| 4 | 49% | 2 | 0.75 |
| 5 | 53% | 1 | 0.75 |
For mock 1, for example: 122 marks out of 200 is a net score of 61%. The questions you answered had an expected time of 81 minutes in total and you spent 90 minutes on them, so pace = 81 ÷ 90 = 0.90.
- A = (5 × 0.61 + 4 × 0.57 + 3 × 0.55 + 2 × 0.49 + 1 × 0.53) ÷ 15 = (3.05 + 2.28 + 1.65 + 0.98 + 0.53) ÷ 15 = 8.49 ÷ 15 = 0.566
- S = (5 × 0.90 + 4 × 0.90 + 3 × 0.80 + 2 × 0.75 + 1 × 0.75) ÷ 15 = (4.50 + 3.60 + 2.40 + 1.50 + 0.75) ÷ 15 = 12.75 ÷ 15 = 0.850
- C: the average of 61, 57, 55, 49 and 53 is 55. The differences from it are +6, +2, 0, −6 and −2 points. Their squares add up to 36 + 4 + 0 + 36 + 4 = 80; 80 ÷ 5 = 16; √16 = 4 points = 0.04. So C = 1 − 0.04 ÷ 0.20 = 1 − 0.20 = 0.80
- K: the paper has 20 syllabus topics and you have answered at least 5 questions in 13 of them: 13 ÷ 20 = 0.65
- Score = round(1000 × (0.55 × 0.566 + 0.15 × 0.850 + 0.15 × 0.80 + 0.15 × 0.65)) = round(1000 × (0.3113 + 0.1275 + 0.1200 + 0.0975)) = round(1000 × 0.6563) = round(656.3) = 656
How to raise it
- A carries 55%. Fewer wrong answers help twice: you lose fewer marks to negative marking and keep the marks you earn. The attempt-strategy tips in your report help here.
- S: aim to finish within the expected time. Going faster than that adds nothing.
- C: steady preparation counts for more than one lucky day.
- K: cover every syllabus topic. Topic quizzes are the quickest way.
What the Score is not
The Score measures your progress on Successfied. It is not a prediction of your marks in the real exam, and not a chance of selection. A 700 doesn't mean "safe" and a 400 doesn't mean "out". Use it to compare yourself with yourself, week after week.
Your Score is calculated separately for each exam paper. It appears on your workspace Home and on your reports, and its trend is in the Analytics tab. It is recalculated every time you submit a full, sectional, PYQ or Live mock on that paper.