20. lean modeling - tu dresdenst.inf.tu-dresden.de/files/teaching/ws15/saab/... · fakultät...
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Fakultät Informatik - Institut Software- und Multimediatechnik - Softwaretechnologie – Prof. Aßmann - Software as a Business
20. Lean Modeling
Prof. Dr. Uwe AßmannTechnische Universität Dresden
Software Engineering Group
Version 0.7
http://st.inf.tu-dresden.de
Dresden, 05.12.15
1) Canvases as collaborative tools
2) Lean modeling with canvases
3) Nested canvases
4) Metrics on flat and nested canvases
5) The canvas cactus as megamodel
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2 Software as a Business
Literature
[CM03] Sitt Sen Chok, Kim Marriott. Automatic Generation of Intelligent Diagram Editors. ACM Transactions on Computer-Human Interaction, Vol. 10, No. 3, September 2003, Pages 244–276.
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Fakultät Informatik - Institut Software- und Multimediatechnik - Softwaretechnologie – Prof. Aßmann - Software as a Business
20.1 Canvases as Light-Weight Cooperation Tools
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4 Software as a Business
► A canvas is a collaborative frontend for a model, in which sticky notes demarcate the formal content from the informal text.
► A lean model is a semi-conceptualized model, an active document with informal and conceptualized content.
■ XML is a similar idea: semi-structured content■ Lean models transfer this idea to model-driven development
► Conceptualization Process: ■ Canvas -> Lean Model -> fully conceptualized Model
4
Canvases as Lean Models
Lean Model(semi-conceptualized)
Canvas Model
Value Proposition isA and B and C
Key partners
Chan
nels
are New
s,
Pres
s, Web
Cost structure is
100€, 2 per day
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Fakultät Informatik - Institut Software- und Multimediatechnik - Softwaretechnologie – Prof. Aßmann - Software as a Business
20.2. Lean Modeling with Canvases
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6 Software as a Business
Schemas for Flat Canvases as Grammars
► A (flat) canvas is a structured questionaire for collaborative development of a model■ Canvas fields with sticky text notes, Canvas questions or answers■ Intra-field constraints, Inter-field constraints■ Canvas left side vs. right side with canvas fill order (partial order)■ NO Subcanvases
► The canvas schema can be described by a grammar in EBNF and OCL or in an Constraint Multiset Grammar (CMG)
■ Example invariants: forall stickynotes in CustomerRelations there is a stickynote in Channels; there must be a revenue
Grammar Fields = Rules { Note ::= Question | Answer Root Field ::= StickyNote:Note *}Grammar BusinessModelCanvas = import FieldsRules { Root BMC ::= LeftPart ValueProposition:Field RightPart LeftPart ::= KeyPartners:Field KeyActivities:Field KeyResources:Field Costs:Field RightPart ::= CustomerRelations:Field Channels:Field CustomerSegments:Field Revenues:Field Invariant forall s:CustomerRelations.StickyNote* exists y:StickyNote, y in Channels.StickyNote* Invariant MUST exists r:StickyNote in Revenues.StickyNotes}
Grammar Fields = Rules { Note ::= Question | Answer Root Field ::= StickyNote:Note *}Grammar BusinessModelCanvas = import FieldsRules { Root BMC ::= LeftPart ValueProposition:Field RightPart LeftPart ::= KeyPartners:Field KeyActivities:Field KeyResources:Field Costs:Field RightPart ::= CustomerRelations:Field Channels:Field CustomerSegments:Field Revenues:Field Invariant forall s:CustomerRelations.StickyNote* exists y:StickyNote, y in Channels.StickyNote* Invariant MUST exists r:StickyNote in Revenues.StickyNotes}
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7 Software as a Business
VPC as Grammar with Constraints
► Invariants:■ Forall gains there must be a gain creator■ Forall pains there must be a pain killer■ Forall pain killers there should be a service or product■ Forall gain creators there should be a service or product
Grammar ValuePropositionCanvas = import Fields Rules { Root VPC ::= LeftPart RightPart LeftPart ::= GainCreator:Field PainKiller:Field ProductsAndServices:Field RightPart ::= Gain:Field Pain:Field CustomerSituation:Field Invariant forall s:Gain.StickyNote* exists y:StickyNote, y in GainCreator.StickyNote* Invariant forall s:Pain.StickyNote* exists y:StickyNote, y in PainKiller.StickyNote* Invariant forall s:PainKiller.StickyNote* exists y:StickyNote, y in ProductsAndServices.StickyNote* Invariant forall s:GainCreator.StickyNote* exists y:StickyNote, y in ProductsAndServices.StickyNote*}
Grammar ValuePropositionCanvas = import Fields Rules { Root VPC ::= LeftPart RightPart LeftPart ::= GainCreator:Field PainKiller:Field ProductsAndServices:Field RightPart ::= Gain:Field Pain:Field CustomerSituation:Field Invariant forall s:Gain.StickyNote* exists y:StickyNote, y in GainCreator.StickyNote* Invariant forall s:Pain.StickyNote* exists y:StickyNote, y in PainKiller.StickyNote* Invariant forall s:PainKiller.StickyNote* exists y:StickyNote, y in ProductsAndServices.StickyNote* Invariant forall s:GainCreator.StickyNote* exists y:StickyNote, y in ProductsAndServices.StickyNote*}
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8 Software as a Business
Validating a Flat Canvas
► A flat canvas is called well-formed, if all fields fulfill all constraints.
► Validation:■ Parse the canvas with its sticky notes■ Evaluate constraints in OCL ■ or with an Attributed Grammar■ or with an Multiset Constraint Grammar
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► A lean model can be merged with another lean model
► A canvas twin is a parallelly edited canvas, which can be merged into a lean model by unifying the fields
► Conceptualization Process: ■ CanvasTwin * -> Lean Model -> fully conceptualized Model■ Assembling all constraints■ Validating all constraints
9
Parallelly Edited Lean Models can be Merged
Lean Model(semi-conceptualized)
Canvases
Model
Value Proposition isA and B and C
Key partners
Chan
nels
are New
s,
Pres
s, Web
Cost structure is
100€, 2 per day
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Fakultät Informatik - Institut Software- und Multimediatechnik - Softwaretechnologie – Prof. Aßmann - Software as a Business
20.3 Nested Canvases
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A Nested Canvas
► A nested canvas (deep canvas) is a link tree with level graphs■ Every canvas forms a sequence, graph or array of fields■ Sticky notes attach text to the fields■ Constraints constrain the content of the canvas fields■ Subcanvases form children
► The fill order of the canvas defines a phase structure on the link tree■ Metrics on advancement (hierarchical wavefront progress)
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12 Software as a Business
The Nested BMC (Deep BMC)
► Many subcanvases
BMC
VPC
Customer JourneyCanvas (CJC)
ReqEC
ChannelFlipbook Canvas
Pain CanvasPain Killer Canvas
Pain-GainBanana
Pain Portfolio CustomerEmpathy Map
CustomerBMCY
Customer DoubleFunnel Canvas
SPIN™ Canvas
Solution Selling™
Canvas
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13 Software as a Business
► A nested canvas twin is a parallelly edited nested canvas, which can be merged into a lean model by unifying the fields
► Conceptualization Process: ■ NestedCanvasTwin * -> Lean Model -> fully conceptualized Model
13
Parallelly Edited Lean Models can be Merged
Lean Model(semi-conceptualized)
Model
Value Proposition isA and B and C
Key partners
Chan
nels
are New
s,
Pres
s, Web
Cost structure is
100€, 2 per day
BMC
VPCCustomer
Empathy Map
BMC
VPCCustomer
Empathy Map
Nested Canvases
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Fakultät Informatik - Institut Software- und Multimediatechnik - Softwaretechnologie – Prof. Aßmann - Software as a Business
20.4 Metrics on Flat Canvases and Nested Canvases
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15 Software as a Business
SWOT Assessment in Matrix Canvas
► Grading is done by spanning up a grading dimension in a canvas matrix■ The grading dimension defines grading functions for sticky notes in the
fields
► BMC-SWOT grading matrix canvas uses the SWOT grading dimension
► LeanCanvas-SWOT uses SWOT grading dimension for LeanCanvas
► Grading on nested canvases: Define the grading functions for all tree nodes of the nested canvas.
■ Tree of canvas matrices■ Attributed Tree
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Thresholds for Canvas Metrics
► Status of invariants is important for the maturity of the canvas
If a set of metric function on a nested canvas does not fulfil its threshold, or if not all invariants are fulfilled,
we call the canvas orange.
If a set of metric function on a nested canvas does not fulfil its threshold, or if not all invariants are fulfilled,
we call the canvas orange.
A green canvas fulfills all its invariants.A green canvas fulfills all its invariants.
A red canvas does not fulfill its MUST invariants.A red canvas does not fulfill its MUST invariants.
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Fakultät Informatik - Institut Software- und Multimediatechnik - Softwaretechnologie – Prof. Aßmann - Software as a Business
20.5 The Canvas Cactus as Megamodel and its Metrics
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18 Software as a Business
The Evolving BMC-VPC Canvas Cactus (extended)
► Growing a tree with side edges (link tree - cactus) out of a first version■ Assess with red-yellow-green; choose a current “greenest” “champion”
► Every step tests hypotheses about the customer
► Not too many canvases are kept active (small dashboard)
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19 Software as a Business
The Megamodel of Evolving Canvases
► A megamodel describes a set of models
► A canvas cactus is a link tree of canvases, i.e., a link-tree-shaped megamodel of canvases
► Canvas cactus evolution evolves the megamodel
► The megamodel of canvases in a cactus is a link tree and can be analysed by RAG■ Metrics■ Constraints
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20 Software as a Business
Business Model Generation with Osterwalder/Pigneur
• CC-BY-SA: http://www.businessmodelgeneration.com/downloads/business_model_canvas_poster.pdf
Prof. U. Aßmann
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21 Software as a Business
21
Requirements Engineering Canvas (REC)
• [Oddoy], C. Wende, Belegarbeit at Chair of Software Engineering, Prof. Aßmann (2014)
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Fill Order of REC
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