Establish an evidence routine

Build a steady documentation cadence so every claim in your project is backed by a dated, recorded observation.

Builds on (2 levels back)inferred · high confidence

Telling an observation from a claim: An evidence routine pairs each claim with a recorded observation; you must first tell the two apart.
Recording at the moment, not later: Evidence is trustworthy only if logged when it happens; the habit of timing the entry is the base of the routine.

Prerequisites are inferred: pending teacher review.

Re-learn the skill with worked practice and clear examples.

An evidence routine means recording observations at a steady cadence: dated, at the moment they happen: so each claim can be traced back to a real record instead of memory.

Step 1: Record at the moment

Write the observation when it happens, not from memory hours later. Memory drifts; a same-moment entry is the trustworthy one.

Step 2: Date every entry

A date turns a loose note into traceable evidence: a reviewer can place it in time and line it up with other entries.

Step 3: Keep the cadence steady

Cadence is how regularly you record. A steady rhythm (for example, after every test run) means no gaps where a claim has nothing behind it.

Practice

Two students each claim their filter "cleared the water faster." Ana wrote down the clearing time and date right after each run. Ben is reciting times from memory a week later. Whose claim has stronger evidence, and why?

Reviewed

A.Ben's, because remembering shows he understands it
B.Ana's, because each time was recorded at the moment with a date
C.Neither, because times are just opinions
D.Ben's, because a week of thought makes the numbers more accurate

Show the worked solution ▾

Answer: B. Ana's, because each time was recorded at the moment with a date

Step 1: Compare when they recorded: Ana logged each result the moment it happened, with a date. Ben is recalling numbers a week later.
Step 2: Judge trustworthiness: A same-moment, dated record can be traced and checked; a week-old memory can drift. Ana's claim rests on real evidence.

Why it's right: Ana recorded each result at the moment with a date, so her claim traces back to a real, checkable record, while Ben's relies on memory that can drift.

Why the others miss:

A: Remembering an outcome does not make the record trustworthy; memory drifts over a week.
C: Recorded measured times are observations, not opinions, so they can serve as evidence.
D: Waiting a week does not improve numbers; it makes them less reliable.

Aligned to BI design process: documentation cadence · reading level ~grade 9

Where you'd see this

A team logs each test run in a shared, dated sheet right after it finishes, so the portfolio shows an unbroken record.

Careers that use this

Quality Control Analyst: Records each test result immediately with a timestamp so product claims can survive an audit.

Video library

Watch: Establish an evidence routine

You Should Be Keeping a Research Notebook

JoshTheEngineer · ~10 min

Guided notes

Fill these in as you work through the lesson.

Big idea: An evidence routine is a steady habit of recording each observation as it happens, with a date, so that every claim you later make can be traced back to a real record.

Key terms: write the meaning

Observation (what you actually saw or measured):
Claim (a statement you want others to believe):
Cadence (the rhythm of a repeated habit):
Evidence (the record that backs a claim):

The rule

Record each as it happens with a date, so that every you make later can point back to it as evidence.

Check yourself

Why is an entry written the moment you measure more trustworthy than one written from memory a week later?
Give one claim and the kind of observation that would serve as its evidence.
What does 'cadence' mean for a documentation routine?

Work one example

You claim "the new bandage stayed on longer than the old one." Describe the routine of observations: what to record and when: that would give that claim real evidence instead of just being your opinion.