Matching Impedance – Closing gap between development and business

1. Matching impedance
Closing the gap between business and development

2. Ohm’s Law (Trust I am an Engineer…)
Ohm’s Law (Trust I am an Engineer…)
Ohm’s Law (Trust I am an Engineer…)
Ohm’s Law (Trust I am an Engineer…)
V = I R
V = I / G
V – Voltage
I – Current
R – Resistance
G – Conductance
G = 1 / R

3. Littles’s
Littles’s
Littles’s
Littles’s Law (…and I love Kanban)
Law (…and I love Kanban)
Law (…and I love Kanban)
Law (…and I love Kanban)
L = λ W
W = L / λ
L – WiP (Voltage)
λ – Throughput (Conductance)
W – Lead Time (Current)

5. What
What
What
What is
is
is
is resistance
resistance
resistance
resistance?
?
?
?
(or Conductance for that matter)
“The electrical resistance of an object
is a measure of its opposition to the
flow of electric current. Its reciprocal
quantity is electrical conductance,
measuring the ease with which an
electric current passes. Electrical
resistance shares some conceptual
parallels with mechanical friction.”
Wikipedia

8. What
What
What
What is
is
is
is Impedance?
Impedance?
Impedance?
Impedance?
(What to do when things become complex)
“In electrical engineering, electrical
impedance is the measure of the
opposition that a circuit presents to a
current when a voltage is applied.”
Wikipedia
Z = R + jX
Z – Impedance
R – Resistance
X – Reactance

9. E = T + jF
E – Estimation
T – Throughput
F – Forecast
Let’s
Let’s
Let’s
Let’s get
get
get
get back
back
back
back to
to
to
to our
our
our
our topic
topic
topic
topic
(no more electrical engineering. For now…)
“Estimation (or estimating) is the process
of finding an estimate, or approximation,
which is a value that is usable for some
purpose even if input data may be
incomplete, uncertain, or unstable.”
Wikipedia

10. E = T + jF
E – Estimation
T – Throughput
F – Forecast
Let’s decompose things
Let’s decompose things
Let’s decompose things
Let’s decompose things
(and hopefully start tying loose ends)
This is something
measurable
But this is not

12. Repeat after me:
You CANNOT use story
points to track progress

13. Repeat after me:
Precise estimation is an
oxymoron. It is either
precise or estimation.

15. What
What
What
What is
is
is
is Reactance?
Reactance?
Reactance?
Reactance?
(back to electrical engineering)
“Reactance is similar to electric resistance in
this respect, but differs in that reactance does
not lead to dissipation of electrical energy as
heat. Instead, energy is stored in the
reactance, and a quarter-cycle later returned
to the circuit, whereas a resistance
continuously loses energy.”
Wikipedia
X = XL - XC
XL – Inductive Reactance
XC – Capacitive Reactance
X – Reactance

16. What
What
What
What is
is
is
is Forecast?
Forecast?
Forecast?
Forecast?
(and please use human terms)
“Forecasting is the process of making
predictions based on past and present
data and most commonly by analysis of
trends. A commonplace example might be
estimation of some variable of interest at
some specified future date.”
Wikipedia
F = WT - AR
WT – Wishful thinking
AR – Actual Reality
F – Forecast

18. What
What
What
What is
is
is
is Impedance matching?
Impedance matching?
Impedance matching?
Impedance matching?
(How do we converge to a common interest)
“In electronics, impedance matching is the
practice of designing the input impedance of
an electrical load or the output impedance of
its corresponding signal source to maximize
the power transfer or minimize signal
reflection from the load”
Wikipedia
ZS = ZL*
ZS – Source Impedance
ZL – Lead Impedance
* – Complex Conjugate

19. Back to business terms
Back to business terms
Back to business terms
Back to business terms
(and no more electronics promised)
FD = FB*
FD – Forecast Development
FB – Forecast Business
* – Complex Conjugate
HERE BE MAGIC

20. What is Complex Conjugate?
What is Complex Conjugate?
What is Complex Conjugate?
What is Complex Conjugate?
(I did promise no more electronics – this is pure math)
“In mathematics, the complex conjugate
of a complex number is the number with
an equal real part and an imaginary part
equal in magnitude but opposite in sign”
Wikipedia
ZS = ZL*
ZS – Source Impedance
ZL – Lead Impedace
* – Complex Conjugate

21. What be the MAGIC?
What be the MAGIC?
What be the MAGIC?
What be the MAGIC?
(and how to utilize that for meaningful business)
Even same real goals might have
different complex elements to them.
Those complex parts usually have their
signs reversed.
Matching goals is more than just
stating and coming to terms.
Bogdan

22. What did we learn?
What did we learn?
What did we learn?
What did we learn?
(besides some engineering mumbo-jumbo)
Decouple progress tracking from estimations.
Understand that business complexity and development complexity
need to be balanced out for maximal power transfer.
E = T + jF
This is something
measurable
But this is not
FD = FB*