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NOTE IDER in-house training materials. Captions follow measured phrase audio timings.
Hypothetical worked cases; figures are instructional examples.

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A financial model becomes useful when its movements
explain the business and its controls reveal mistakes

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before a decision depends on them.

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In this clinic we will connect profit, working
capital, investment and financing through a complete

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numerical case. All amounts are hypothetical and
expressed in thousands of Ghana cedis unless stated

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otherwise.

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We will deliberately introduce errors and examine
which checks detect them.

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Keep three questions in view: does each balance roll
forward from an independently supported opening

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position, does every cash movement have an economic
explanation and do changes propagate consistently?

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A balance sheet that balances is necessary, but it is
not evidence that the underlying revenue or

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assumptions are true.

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Start with a model map before writing formulas. Put
assumptions in a clearly identified input area, give

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each a unit and source date, then connect operational
schedules to the financial statements.

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A debt schedule should explain debt, interest and
principal payments; a fixed-asset schedule should

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explain purchases, depreciation and carrying value.

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Avoid entering the same assumption separately in
several places because later revisions will drift

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apart. Use a consistent time axis, sign convention and
currency throughout.

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Define which values are historical observations and
which are forecasts. Finally place diagnostic controls

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near the outputs a reviewer actually sees.

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Hidden checks on an obscure worksheet provide little
protection when the investment committee reads only

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the summary.

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Our opening balance sheet contains cash of two
hundred, receivables of three hundred, inventory of

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four hundred and equipment of one thousand. Total
assets are nineteen hundred.

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Payables of two hundred and fifty, debt of six hundred
and fifty and equity of one thousand also total

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nineteen hundred.

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Before forecasting, reconcile these opening balances
to an approved ledger and supporting schedules. If an

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unexplained difference exists, investigate it rather
than inserting a miscellaneous asset.

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Opening errors travel into every subsequent period and
can make a plausible forecast impossible to reconcile.

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Record the reporting date and whether balances include
tax, restricted cash or intercompany amounts.

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Consistent definitions matter just as much as the
arithmetic agreement.

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Revenue is twenty four hundred and cost of sales
fourteen hundred and forty, producing gross profit of

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nine hundred and sixty.

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Deduct cash operating costs of four hundred and eighty
and depreciation of one hundred to obtain operating

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profit of three hundred and eighty.

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Interest of sixty five leaves profit before tax of
three hundred and fifteen.

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Applying an illustrative twenty five percent tax rate
gives seventy eight point seven five of tax and net

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income of two hundred and thirty six point two five.

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In a real model, revenue should connect to volume,
price and recognition evidence; interest should

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connect to the financing assumptions. A hard-coded
profit total prevents meaningful testing when those

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drivers change.

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Net income does not equal cash generated.

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Start with two hundred and thirty six point two five,
add back depreciation of one hundred, subtract the one

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hundred increase in receivables and the eighty
increase in inventory, then add the

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fifty increase in payables. Cash after interest and
tax is two hundred and six point two five.

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Increased receivables mean revenue has not yet become
cash; increased inventory means funds are tied up in

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goods; increased supplier balances temporarily
preserve cash.

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Explain these signs using business events rather than
memorising them. This is an analytical bridge for our

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case.

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Formal cash-flow presentation, including the
classification of interest, must follow the applicable

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reporting framework and period.

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Now roll cash forward independently.

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Opening cash of two hundred plus cash generated of two
hundred and six point two five, less capital

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expenditure of one hundred and fifty, plus new
borrowing of fifty and less principal

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repayment of one hundred gives closing cash of two
hundred and six point two five.

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The equality between operating cash and closing cash
is a coincidence in this example; do not turn it into

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a formula.

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Investment belongs in both the asset schedule and the
cash schedule, while borrowing affects debt and cash

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without creating revenue. Label principal separately
from interest so that repayment is not accidentally

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expensed.

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Each financing movement should reconcile to an actual
facility or explicitly stated forecast assumption.

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A colleague's model reports closing cash of three
hundred and six point two five, exactly one hundred

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above our result. The profit statement, investment and
debt movements match the case.

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Inspect the working-capital bridge and determine which
omission could explain the difference. Do not simply

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overwrite closing cash with the expected answer.

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Write the missing business event, the required sign
and the supporting record that would establish the

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amount. Then identify which second statement or
schedule should be checked after correcting the cash

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formula.

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Pause the video while you perform the diagnosis.

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An effective review follows a discrepancy back to its
cause and confirms the repair across all affected

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outputs rather than forcing one visible total to
agree.

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The omitted adjustment is the increase in receivables
from three hundred to four hundred. That additional

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one hundred was recognised as revenue but remained
uncollected at the reporting date.

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It must therefore be subtracted when converting profit
into cash. Restoring the adjustment reduces closing

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cash from three hundred and six point two five to two
hundred and six point two five.

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Verify the receivables movement against opening and
closing customer balances, then reconcile it to

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invoice and collection records. The closing balance
sheet should carry receivables of four hundred.

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Also confirm that the direct collections schedule, if
present, gives the same cash result. Independent

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routes to the same total are stronger controls than
repeating an identical formula twice.

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Equipment closes at ten hundred and fifty: opening one
thousand plus purchases of one hundred and fifty less

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depreciation of one hundred.

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Debt closes at six hundred after new borrowing of
fifty and principal repayment of one hundred.

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With no dividends or new equity, retained profit
raises equity to twelve hundred and thirty six point

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two five.

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Closing assets comprise cash of two hundred and six
point two five, receivables of four hundred, inventory

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of four hundred and eighty and equipment of ten
hundred and fifty.

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They total twenty one hundred and thirty six point two
five, equal to payables, debt and equity.

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Calculate every component independently; making cash
the balancing figure would conceal the error we just

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diagnosed.

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Three layers of controls serve different purposes.
Mechanical checks test whether statements connect:

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assets equal liabilities plus equity, debt rolls
forward and cash movements reconcile.

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Economic checks test whether outputs make sense: sales
cannot exceed capacity without investment, debtor days

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should match collections and negative inventory
requires investigation.

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Evidence checks trace amounts to contracts, invoices,
ledgers and bank records. A model can pass the first

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layer while failing the other two.

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For example, fabricated credit sales can increase both
profit and receivables while preserving balance-sheet

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equality. Design checks from a different route or
source where possible.

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Give failures clear thresholds and visible messages,
and prevent a presentation from quietly suppressing

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unresolved material exceptions.

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Take one significant customer transaction and trace it
from contract to delivery evidence, invoice, ledger

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and eventual bank receipt. Each document answers a
different question.

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A signed contract does not prove the promised service
was performed; an invoice does not prove cash was

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collected; a bank receipt may relate to an advance or
a different period.

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Reconcile customer identifiers, dates, amounts and
currency across the chain. Investigate credit notes,

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returns, disputed invoices and cut-off around
reporting dates.

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Use the relevant revenue recognition requirements for
the actual contract, rather than assuming every

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invoice creates immediate revenue.

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This transaction-level walk-through helps detect
errors that aggregate ratios miss and teaches junior

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analysts how the commercial process creates the
financial statements.

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A scenario should modify a business driver and let
connected schedules transmit its consequences.

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Extending a collection period changes receivables and
cash, while recognised revenue can remain unchanged.

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Cutting price generally changes revenue, margin and
tax, even if unit volume remains stable. Increasing

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production beyond capacity may require a discrete
investment and additional staffing rather than a

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smooth percentage increase.

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After each change, inspect all statements and control
totals. Freeze the scenario inputs with a descriptive

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version name and record why the assumptions belong
together.

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Avoid editing output cells to create a desired result.
For complex models, isolate circular dependencies such

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as cash-funded debt repayment and interest, then
document the chosen calculation method and its

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limitations.

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Return to the complete base model. Thirty thousand
cedis of already recognised sales that were expected

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to be collected remains outstanding at the year end.

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Revenue and tax are unchanged; this is purely a
collection timing difference. Calculate the new

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closing cash balance, the new receivables balance and
the effect on total assets.

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Explain why net income should not change in this
specified exercise. Do not introduce an additional

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sale: the transaction is already included in the
original revenue total.

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Then name the operational risk that a larger or
repeated delay could create even though total assets

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remain constant.

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Pause now and write the three revised outputs plus a
short explanation before viewing the worked answer.

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Closing cash falls by thirty to one hundred and
seventy six point two five, while receivables rise by

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thirty to four hundred and thirty.

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Total assets remain twenty one hundred and thirty six
point two five because one asset category replaces

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another.

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Net income is unchanged under the exercise
assumptions: no new revenue, tax change or impairment

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has been introduced. Nevertheless, readily available
cash has declined, which can threaten payment capacity

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or borrowing headroom.

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In an actual review, investigate whether the delay
signals a dispute or credit deterioration requiring

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further assessment. The lesson is that a balanced
statement can conceal a liquidity problem.

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Use ageing and subsequent collections to distinguish
an ordinary timing variation from a worsening

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recoverability issue.

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Before reviewing a model, preserve the original
version and record the assumptions used to generate

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its outputs.

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For each finding, capture the cell or schedule, the
business explanation, supporting evidence, proposed

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correction and effect on decisions.

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Classify issues by consequence rather than cosmetic
appearance: an incorrect debt maturity can matter more

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than inconsistent formatting.

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After a repair, rerun relevant scenarios and confirm
that the change has not broken another schedule.

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A second reviewer should reproduce important
calculations from independent evidence, not merely

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click through the author's formulas.

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Sign-off should identify who prepared and reviewed the
work, when they did so and which limitations remain.

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Never invent a professional signature or imply an
assurance review that did not occur.

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Apply this clinic by selecting a model with an
upcoming decision and preparing a compact integrity

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review. Reconcile opening balances, rebuild a
profit-to-cash bridge and independently roll forward

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debt, equipment and equity.

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Trace one material transaction through its evidence
chain, then introduce a collection-delay scenario and

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inspect every affected output.

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Your deliverable should include the source register,
visible checks, an exception log and a short

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explanation of the model's remaining limitations.

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Complete the six questions and two applied tasks
before using the procedure on a live assignment. The

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goal is not a workbook with no warning lights at any
cost.

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It is a model whose numbers, assumptions and
unresolved uncertainties can be explained and

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challenged responsibly.

